Merge pull request 'feature/FA-misc_ServersidedChapterReader' (#61) from feature/FA-misc_ServersidedChapterReader into master

Reviewed-on: #61

.gitea/workflows/build-gateway.yml

@@ -28,6 +28,9 @@ jobs:
           - name: user-service
             project: FictionArchive.Service.UserService
             subgraph: User
+          - name: usernoveldata-service
+            project: FictionArchive.Service.UserNovelDataService
+            subgraph: UserNovelData
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -110,6 +113,12 @@ jobs:
           name: user-service-subgraph
           path: subgraphs/user
 
+      - name: Download UserNovelData Service subgraph
+        uses: christopherhx/gitea-download-artifact@v4
+        with:
+          name: usernoveldata-service-subgraph
+          path: subgraphs/usernoveldata
+
       - name: Configure subgraph URLs for Docker
         run: |
           for fsp in subgraphs/*/*.fsp; do

.gitea/workflows/release.yml

@@ -27,6 +27,8 @@ jobs:
             dockerfile: FictionArchive.Service.SchedulerService/Dockerfile
           - name: authentication-service
             dockerfile: FictionArchive.Service.AuthenticationService/Dockerfile
+          - name: usernoveldata-service
+            dockerfile: FictionArchive.Service.UserNovelDataService/Dockerfile
     steps:
       - name: Checkout
         uses: actions/checkout@v4

.gitignore

@@ -140,3 +140,6 @@ appsettings.Local.json
 schema.graphql
 *.fsp
 gateway.fgp
+
+# Git worktrees
+.worktrees/

FictionArchive.Service.NovelService.Tests/NovelUpdateServiceTests.cs

@@ -42,6 +42,13 @@ public class NovelUpdateServiceTests
             Images = new List<Image>()
         };
 
+        var volume = new Volume
+        {
+            Order = 1,
+            Name = LocalizationKey.CreateFromText("Main Story", Language.En),
+            Chapters = new List<Chapter> { chapter }
+        };
+
         var novel = new Novel
         {
             Url = "http://demo/novel",
@@ -52,14 +59,14 @@ public class NovelUpdateServiceTests
             Source = source,
             Name = LocalizationKey.CreateFromText("Demo Novel", Language.En),
             Description = LocalizationKey.CreateFromText("Description", Language.En),
-            Chapters = new List<Chapter> { chapter },
+            Volumes = new List<Volume> { volume },
             Tags = new List<NovelTag>()
         };
 
         dbContext.Novels.Add(novel);
         dbContext.SaveChanges();
 
-        return new NovelCreateResult(novel, chapter);
+        return new NovelCreateResult(novel, volume, chapter);
     }
 
     private static NovelUpdateService CreateService(
@@ -81,7 +88,7 @@ public class NovelUpdateServiceTests
     {
         using var dbContext = CreateDbContext();
         var source = new Source { Name = "Demo", Key = "demo", Url = "http://demo" };
-        var (novel, chapter) = CreateNovelWithSingleChapter(dbContext, source);
+        var (novel, volume, chapter) = CreateNovelWithSingleChapter(dbContext, source);
 
         var rawHtml = "<p>Hello</p><img src=\"http://img/x1.jpg\" alt=\"first\" /><img src=\"http://img/x2.jpg\" alt=\"second\" />";
         var image1 = new ImageData { Url = "http://img/x1.jpg", Data = new byte[] { 1, 2, 3 } };
@@ -103,7 +110,7 @@ public class NovelUpdateServiceTests
         var pendingImageUrl = "https://pending/placeholder.jpg";
         var service = CreateService(dbContext, adapter, eventBus, pendingImageUrl);
 
-        var updatedChapter = await service.PullChapterContents(novel.Id, chapter.Order);
+        var updatedChapter = await service.PullChapterContents(novel.Id, volume.Id, chapter.Order);
 
         updatedChapter.Images.Should().HaveCount(2);
         updatedChapter.Images.Select(i => i.OriginalPath).Should().BeEquivalentTo(new[] { image1.Url, image2.Url });
@@ -131,7 +138,7 @@ public class NovelUpdateServiceTests
     {
         using var dbContext = CreateDbContext();
         var source = new Source { Name = "Demo", Key = "demo", Url = "http://demo" };
-        var (novel, chapter) = CreateNovelWithSingleChapter(dbContext, source);
+        var (novel, volume, chapter) = CreateNovelWithSingleChapter(dbContext, source);
 
         var rawHtml = "<p>Hi</p><img src=\"http://img/x1.jpg\">";
         var image = new ImageData { Url = "http://img/x1.jpg", Data = new byte[] { 7, 8, 9 } };
@@ -150,7 +157,7 @@ public class NovelUpdateServiceTests
 
         var service = CreateService(dbContext, adapter, eventBus);
 
-        var updatedChapter = await service.PullChapterContents(novel.Id, chapter.Order);
+        var updatedChapter = await service.PullChapterContents(novel.Id, volume.Id, chapter.Order);
 
         var storedHtml = updatedChapter.Body.Texts.Single().Text;
         var doc = new HtmlDocument();
@@ -161,7 +168,7 @@ public class NovelUpdateServiceTests
         imgNode.GetAttributeValue("src", string.Empty).Should().Be("https://pending/placeholder.jpg");
     }
 
-    private record NovelCreateResult(Novel Novel, Chapter Chapter);
+    private record NovelCreateResult(Novel Novel, Volume Volume, Chapter Chapter);
 
     #region UpdateImage Tests
 
@@ -199,7 +206,7 @@ public class NovelUpdateServiceTests
         // Arrange
         using var dbContext = CreateDbContext();
         var source = new Source { Name = "Demo", Key = "demo", Url = "http://demo" };
-        var (novel, chapter) = CreateNovelWithSingleChapter(dbContext, source);
+        var (novel, _, chapter) = CreateNovelWithSingleChapter(dbContext, source);
 
         var image = new Image
         {
@@ -252,7 +259,7 @@ public class NovelUpdateServiceTests
         // Arrange
         using var dbContext = CreateDbContext();
         var source = new Source { Name = "Demo", Key = "demo", Url = "http://demo" };
-        var (novel, chapter) = CreateNovelWithSingleChapter(dbContext, source);
+        var (_, _, chapter) = CreateNovelWithSingleChapter(dbContext, source);
 
         var image1 = new Image { OriginalPath = "http://original/img1.jpg", Chapter = chapter };
         var image2 = new Image { OriginalPath = "http://original/img2.jpg", Chapter = chapter };

FictionArchive.Service.NovelService/GraphQL/Mutation.cs

@@ -21,11 +21,13 @@ public class Mutation
     }
 
     [Authorize]
-    public async Task<ChapterPullRequestedEvent> FetchChapterContents(uint novelId,
-        uint chapterNumber,
+    public async Task<ChapterPullRequestedEvent> FetchChapterContents(
+        uint novelId,
+        uint volumeId,
+        uint chapterOrder,
         NovelUpdateService service)
     {
-        return await service.QueueChapterPull(novelId, chapterNumber);
+        return await service.QueueChapterPull(novelId, volumeId, chapterOrder);
     }
 
     [Error<KeyNotFoundException>]

FictionArchive.Service.NovelService/GraphQL/Query.cs

@@ -77,32 +77,45 @@ public class Query
                 }
                 : null,
 
-            Chapters = novel.Chapters.Select(chapter => new ChapterDto
+            Volumes = novel.Volumes.OrderBy(v => v.Order).Select(volume => new VolumeDto
             {
-                Id = chapter.Id,
-                CreatedTime = chapter.CreatedTime,
-                LastUpdatedTime = chapter.LastUpdatedTime,
-                Revision = chapter.Revision,
-                Order = chapter.Order,
-                Url = chapter.Url,
-                Name = chapter.Name.Texts
+                Id = volume.Id,
+                CreatedTime = volume.CreatedTime,
+                LastUpdatedTime = volume.LastUpdatedTime,
+                Order = volume.Order,
+                Name = volume.Name.Texts
                     .Where(t => t.Language == preferredLanguage)
                     .Select(t => t.Text)
                     .FirstOrDefault()
-                    ?? chapter.Name.Texts.Select(t => t.Text).FirstOrDefault()
+                    ?? volume.Name.Texts.Select(t => t.Text).FirstOrDefault()
                     ?? "",
-                Body = chapter.Body.Texts
-                    .Where(t => t.Language == preferredLanguage)
-                    .Select(t => t.Text)
-                    .FirstOrDefault()
-                    ?? chapter.Body.Texts.Select(t => t.Text).FirstOrDefault()
-                    ?? "",
-                Images = chapter.Images.Select(image => new ImageDto
+                Chapters = volume.Chapters.OrderBy(c => c.Order).Select(chapter => new ChapterDto
                 {
-                    Id = image.Id,
-                    CreatedTime = image.CreatedTime,
-                    LastUpdatedTime = image.LastUpdatedTime,
-                    NewPath = image.NewPath
+                    Id = chapter.Id,
+                    CreatedTime = chapter.CreatedTime,
+                    LastUpdatedTime = chapter.LastUpdatedTime,
+                    Revision = chapter.Revision,
+                    Order = chapter.Order,
+                    Url = chapter.Url,
+                    Name = chapter.Name.Texts
+                        .Where(t => t.Language == preferredLanguage)
+                        .Select(t => t.Text)
+                        .FirstOrDefault()
+                        ?? chapter.Name.Texts.Select(t => t.Text).FirstOrDefault()
+                        ?? "",
+                    Body = chapter.Body.Texts
+                        .Where(t => t.Language == preferredLanguage)
+                        .Select(t => t.Text)
+                        .FirstOrDefault()
+                        ?? chapter.Body.Texts.Select(t => t.Text).FirstOrDefault()
+                        ?? "",
+                    Images = chapter.Images.Select(image => new ImageDto
+                    {
+                        Id = image.Id,
+                        CreatedTime = image.CreatedTime,
+                        LastUpdatedTime = image.LastUpdatedTime,
+                        NewPath = image.NewPath
+                    }).ToList()
                 }).ToList()
             }).ToList(),
 
@@ -140,11 +153,12 @@ public class Query
     public IQueryable<ChapterReaderDto> GetChapter(
         NovelServiceDbContext dbContext,
         uint novelId,
+        uint volumeOrder,
         uint chapterOrder,
         Language preferredLanguage = Language.En)
     {
         return dbContext.Chapters
-            .Where(c => c.Novel.Id == novelId && c.Order == chapterOrder)
+            .Where(c => c.Volume.Novel.Id == novelId && c.Volume.Order == volumeOrder && c.Order == chapterOrder)
             .Select(chapter => new ChapterReaderDto
             {
                 Id = chapter.Id,
@@ -176,24 +190,74 @@ public class Query
                     NewPath = image.NewPath
                 }).ToList(),
 
-                NovelId = chapter.Novel.Id,
-                NovelName = chapter.Novel.Name.Texts
+                NovelId = chapter.Volume.Novel.Id,
+                NovelName = chapter.Volume.Novel.Name.Texts
                     .Where(t => t.Language == preferredLanguage)
                     .Select(t => t.Text)
                     .FirstOrDefault()
-                    ?? chapter.Novel.Name.Texts.Select(t => t.Text).FirstOrDefault()
+                    ?? chapter.Volume.Novel.Name.Texts.Select(t => t.Text).FirstOrDefault()
                     ?? "",
-                TotalChapters = chapter.Novel.Chapters.Count,
-                PrevChapterOrder = chapter.Novel.Chapters
+
+                // Volume context
+                VolumeId = chapter.Volume.Id,
+                VolumeName = chapter.Volume.Name.Texts
+                    .Where(t => t.Language == preferredLanguage)
+                    .Select(t => t.Text)
+                    .FirstOrDefault()
+                    ?? chapter.Volume.Name.Texts.Select(t => t.Text).FirstOrDefault()
+                    ?? "",
+                VolumeOrder = chapter.Volume.Order,
+                TotalChaptersInVolume = chapter.Volume.Chapters.Count,
+
+                // Previous chapter: first try same volume, then last chapter of previous volume
+                PrevChapterVolumeOrder = chapter.Volume.Chapters
+                    .Where(c => c.Order < chapterOrder)
+                    .OrderByDescending(c => c.Order)
+                    .Select(c => (int?)chapter.Volume.Order)
+                    .FirstOrDefault()
+                    ?? chapter.Volume.Novel.Volumes
+                        .Where(v => v.Order < chapter.Volume.Order)
+                        .OrderByDescending(v => v.Order)
+                        .SelectMany(v => v.Chapters.OrderByDescending(c => c.Order).Take(1))
+                        .Select(c => (int?)c.Volume.Order)
+                        .FirstOrDefault(),
+
+                PrevChapterOrder = chapter.Volume.Chapters
                     .Where(c => c.Order < chapterOrder)
                     .OrderByDescending(c => c.Order)
                     .Select(c => (uint?)c.Order)
-                    .FirstOrDefault(),
-                NextChapterOrder = chapter.Novel.Chapters
+                    .FirstOrDefault()
+                    ?? chapter.Volume.Novel.Volumes
+                        .Where(v => v.Order < chapter.Volume.Order)
+                        .OrderByDescending(v => v.Order)
+                        .SelectMany(v => v.Chapters.OrderByDescending(c => c.Order).Take(1))
+                        .Select(c => (uint?)c.Order)
+                        .FirstOrDefault(),
+
+                // Next chapter: first try same volume, then first chapter of next volume
+                NextChapterVolumeOrder = chapter.Volume.Chapters
+                    .Where(c => c.Order > chapterOrder)
+                    .OrderBy(c => c.Order)
+                    .Select(c => (int?)chapter.Volume.Order)
+                    .FirstOrDefault()
+                    ?? chapter.Volume.Novel.Volumes
+                        .Where(v => v.Order > chapter.Volume.Order)
+                        .OrderBy(v => v.Order)
+                        .SelectMany(v => v.Chapters.OrderBy(c => c.Order).Take(1))
+                        .Select(c => (int?)c.Volume.Order)
+                        .FirstOrDefault(),
+
+                NextChapterOrder = chapter.Volume.Chapters
                     .Where(c => c.Order > chapterOrder)
                     .OrderBy(c => c.Order)
                     .Select(c => (uint?)c.Order)
                     .FirstOrDefault()
+                    ?? chapter.Volume.Novel.Volumes
+                        .Where(v => v.Order > chapter.Volume.Order)
+                        .OrderBy(v => v.Order)
+                        .SelectMany(v => v.Chapters.OrderBy(c => c.Order).Take(1))
+                        .Select(c => (uint?)c.Order)
+                        .FirstOrDefault()
             });
     }
 }

FictionArchive.Service.NovelService/Migrations/20251229203027_AddVolumes.Designer.cs

@@ -0,0 +1,605 @@
+// <auto-generated />
+using System;
+using FictionArchive.Service.NovelService.Services;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.NovelService.Migrations
+{
+    [DbContext(typeof(NovelServiceDbContext))]
+    [Migration("20251229203027_AddVolumes")]
+    partial class AddVolumes
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.11")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Images.Image", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<long?>("ChapterId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("NewPath")
+                        .HasColumnType("text");
+
+                    b.Property<string>("OriginalPath")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ChapterId");
+
+                    b.ToTable("Images");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("LocalizationKeys");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Localization.LocalizationRequest", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("EngineId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Guid>("KeyRequestedForTranslationId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("TranslateTo")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EngineId");
+
+                    b.HasIndex("KeyRequestedForTranslationId");
+
+                    b.ToTable("LocalizationRequests");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Localization.LocalizationText", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("Language")
+                        .HasColumnType("integer");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid?>("LocalizationKeyId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Text")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<long?>("TranslationEngineId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("LocalizationKeyId");
+
+                    b.HasIndex("TranslationEngineId");
+
+                    b.ToTable("LocalizationText");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Chapter", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Guid>("BodyId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid>("NameId")
+                        .HasColumnType("uuid");
+
+                    b.Property<long>("Order")
+                        .HasColumnType("bigint");
+
+                    b.Property<long>("Revision")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("Url")
+                        .HasColumnType("text");
+
+                    b.Property<long>("VolumeId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BodyId");
+
+                    b.HasIndex("NameId");
+
+                    b.HasIndex("VolumeId", "Order")
+                        .IsUnique();
+
+                    b.ToTable("Chapter");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Novel", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<long>("AuthorId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Guid?>("CoverImageId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid>("DescriptionId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("ExternalId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid>("NameId")
+                        .HasColumnType("uuid");
+
+                    b.Property<int>("RawLanguage")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("RawStatus")
+                        .HasColumnType("integer");
+
+                    b.Property<long>("SourceId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int?>("StatusOverride")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Url")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AuthorId");
+
+                    b.HasIndex("CoverImageId");
+
+                    b.HasIndex("DescriptionId");
+
+                    b.HasIndex("NameId");
+
+                    b.HasIndex("SourceId");
+
+                    b.HasIndex("ExternalId", "SourceId")
+                        .IsUnique();
+
+                    b.ToTable("Novels");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.NovelTag", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid>("DisplayNameId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Key")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long?>("SourceId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("TagType")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DisplayNameId");
+
+                    b.HasIndex("SourceId");
+
+                    b.ToTable("Tags");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Person", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("ExternalUrl")
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid>("NameId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NameId");
+
+                    b.ToTable("Person");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Source", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Key")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Url")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Sources");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.TranslationEngine", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Key")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("TranslationEngines");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Volume", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid>("NameId")
+                        .HasColumnType("uuid");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("Order")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NameId");
+
+                    b.HasIndex("NovelId", "Order")
+                        .IsUnique();
+
+                    b.ToTable("Volume");
+                });
+
+            modelBuilder.Entity("NovelNovelTag", b =>
+                {
+                    b.Property<long>("NovelsId")
+                        .HasColumnType("bigint");
+
+                    b.Property<long>("TagsId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("NovelsId", "TagsId");
+
+                    b.HasIndex("TagsId");
+
+                    b.ToTable("NovelNovelTag");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Images.Image", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Chapter", "Chapter")
+                        .WithMany("Images")
+                        .HasForeignKey("ChapterId");
+
+                    b.Navigation("Chapter");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Localization.LocalizationRequest", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.TranslationEngine", "Engine")
+                        .WithMany()
+                        .HasForeignKey("EngineId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", "KeyRequestedForTranslation")
+                        .WithMany()
+                        .HasForeignKey("KeyRequestedForTranslationId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Engine");
+
+                    b.Navigation("KeyRequestedForTranslation");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Localization.LocalizationText", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", null)
+                        .WithMany("Texts")
+                        .HasForeignKey("LocalizationKeyId");
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.TranslationEngine", "TranslationEngine")
+                        .WithMany()
+                        .HasForeignKey("TranslationEngineId");
+
+                    b.Navigation("TranslationEngine");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Chapter", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", "Body")
+                        .WithMany()
+                        .HasForeignKey("BodyId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", "Name")
+                        .WithMany()
+                        .HasForeignKey("NameId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Volume", "Volume")
+                        .WithMany("Chapters")
+                        .HasForeignKey("VolumeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Body");
+
+                    b.Navigation("Name");
+
+                    b.Navigation("Volume");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Novel", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Person", "Author")
+                        .WithMany()
+                        .HasForeignKey("AuthorId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Images.Image", "CoverImage")
+                        .WithMany()
+                        .HasForeignKey("CoverImageId");
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", "Description")
+                        .WithMany()
+                        .HasForeignKey("DescriptionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", "Name")
+                        .WithMany()
+                        .HasForeignKey("NameId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Source", "Source")
+                        .WithMany()
+                        .HasForeignKey("SourceId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Author");
+
+                    b.Navigation("CoverImage");
+
+                    b.Navigation("Description");
+
+                    b.Navigation("Name");
+
+                    b.Navigation("Source");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.NovelTag", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", "DisplayName")
+                        .WithMany()
+                        .HasForeignKey("DisplayNameId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Source", "Source")
+                        .WithMany()
+                        .HasForeignKey("SourceId");
+
+                    b.Navigation("DisplayName");
+
+                    b.Navigation("Source");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Person", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", "Name")
+                        .WithMany()
+                        .HasForeignKey("NameId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Name");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Volume", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", "Name")
+                        .WithMany()
+                        .HasForeignKey("NameId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Novel", "Novel")
+                        .WithMany("Volumes")
+                        .HasForeignKey("NovelId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Name");
+
+                    b.Navigation("Novel");
+                });
+
+            modelBuilder.Entity("NovelNovelTag", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Novel", null)
+                        .WithMany()
+                        .HasForeignKey("NovelsId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.NovelTag", null)
+                        .WithMany()
+                        .HasForeignKey("TagsId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", b =>
+                {
+                    b.Navigation("Texts");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Chapter", b =>
+                {
+                    b.Navigation("Images");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Novel", b =>
+                {
+                    b.Navigation("Volumes");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Volume", b =>
+                {
+                    b.Navigation("Chapters");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

FictionArchive.Service.NovelService/Migrations/20251229203027_AddVolumes.cs

@@ -0,0 +1,195 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.NovelService.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddVolumes : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            // 1. Create the Volume table
+            migrationBuilder.CreateTable(
+                name: "Volume",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Order = table.Column<int>(type: "integer", nullable: false),
+                    NameId = table.Column<Guid>(type: "uuid", nullable: false),
+                    NovelId = table.Column<long>(type: "bigint", nullable: false),
+                    CreatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    LastUpdatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Volume", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Volume_LocalizationKeys_NameId",
+                        column: x => x.NameId,
+                        principalTable: "LocalizationKeys",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Volume_Novels_NovelId",
+                        column: x => x.NovelId,
+                        principalTable: "Novels",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Volume_NameId",
+                table: "Volume",
+                column: "NameId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Volume_NovelId_Order",
+                table: "Volume",
+                columns: new[] { "NovelId", "Order" },
+                unique: true);
+
+            // 2. Add nullable VolumeId column to Chapter (keep NovelId for now)
+            migrationBuilder.AddColumn<long>(
+                name: "VolumeId",
+                table: "Chapter",
+                type: "bigint",
+                nullable: true);
+
+            // 3. Data migration: Create volumes and link chapters for each novel
+            migrationBuilder.Sql(@"
+DO $$
+DECLARE
+    novel_rec RECORD;
+    loc_key_id uuid;
+    volume_id bigint;
+BEGIN
+    FOR novel_rec IN SELECT ""Id"", ""RawLanguage"" FROM ""Novels"" LOOP
+        -- Create LocalizationKey for volume name
+        loc_key_id := gen_random_uuid();
+        INSERT INTO ""LocalizationKeys"" (""Id"", ""CreatedTime"", ""LastUpdatedTime"")
+        VALUES (loc_key_id, NOW(), NOW());
+
+        -- Create LocalizationText for 'Main Story' in novel's raw language
+        INSERT INTO ""LocalizationText"" (""Id"", ""LocalizationKeyId"", ""Language"", ""Text"", ""CreatedTime"", ""LastUpdatedTime"")
+        VALUES (gen_random_uuid(), loc_key_id, novel_rec.""RawLanguage"", 'Main Story', NOW(), NOW());
+
+        -- Create Volume for this novel
+        INSERT INTO ""Volume"" (""Order"", ""NameId"", ""NovelId"", ""CreatedTime"", ""LastUpdatedTime"")
+        VALUES (1, loc_key_id, novel_rec.""Id"", NOW(), NOW())
+        RETURNING ""Id"" INTO volume_id;
+
+        -- Link all chapters of this novel to the new volume
+        UPDATE ""Chapter"" SET ""VolumeId"" = volume_id WHERE ""NovelId"" = novel_rec.""Id"";
+    END LOOP;
+END $$;
+            ");
+
+            // 4. Drop old FK and index for NovelId
+            migrationBuilder.DropForeignKey(
+                name: "FK_Chapter_Novels_NovelId",
+                table: "Chapter");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Chapter_NovelId",
+                table: "Chapter");
+
+            // 5. Drop NovelId column from Chapter
+            migrationBuilder.DropColumn(
+                name: "NovelId",
+                table: "Chapter");
+
+            // 6. Make VolumeId non-nullable
+            migrationBuilder.AlterColumn<long>(
+                name: "VolumeId",
+                table: "Chapter",
+                type: "bigint",
+                nullable: false,
+                oldClrType: typeof(long),
+                oldType: "bigint",
+                oldNullable: true);
+
+            // 7. Add unique index and FK for VolumeId
+            migrationBuilder.CreateIndex(
+                name: "IX_Chapter_VolumeId_Order",
+                table: "Chapter",
+                columns: new[] { "VolumeId", "Order" },
+                unique: true);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Chapter_Volume_VolumeId",
+                table: "Chapter",
+                column: "VolumeId",
+                principalTable: "Volume",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            // Add back NovelId column
+            migrationBuilder.AddColumn<long>(
+                name: "NovelId",
+                table: "Chapter",
+                type: "bigint",
+                nullable: true);
+
+            // Migrate data back: set NovelId from Volume
+            migrationBuilder.Sql(@"
+UPDATE ""Chapter"" c
+SET ""NovelId"" = v.""NovelId""
+FROM ""Volume"" v
+WHERE c.""VolumeId"" = v.""Id"";
+            ");
+
+            // Make NovelId non-nullable
+            migrationBuilder.AlterColumn<long>(
+                name: "NovelId",
+                table: "Chapter",
+                type: "bigint",
+                nullable: false,
+                oldClrType: typeof(long),
+                oldType: "bigint",
+                oldNullable: true);
+
+            // Drop VolumeId FK and index
+            migrationBuilder.DropForeignKey(
+                name: "FK_Chapter_Volume_VolumeId",
+                table: "Chapter");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Chapter_VolumeId_Order",
+                table: "Chapter");
+
+            // Drop VolumeId column
+            migrationBuilder.DropColumn(
+                name: "VolumeId",
+                table: "Chapter");
+
+            // Recreate NovelId index and FK
+            migrationBuilder.CreateIndex(
+                name: "IX_Chapter_NovelId",
+                table: "Chapter",
+                column: "NovelId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Chapter_Novels_NovelId",
+                table: "Chapter",
+                column: "NovelId",
+                principalTable: "Novels",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+
+            // Note: Volume LocalizationKeys are not cleaned up in Down migration
+            // as they may have been modified. Manual cleanup may be needed.
+            migrationBuilder.DropTable(
+                name: "Volume");
+        }
+    }
+}

FictionArchive.Service.NovelService/Migrations/NovelServiceDbContextModelSnapshot.cs

@@ -153,9 +153,6 @@ namespace FictionArchive.Service.NovelService.Migrations
                     b.Property<Guid>("NameId")
                         .HasColumnType("uuid");
 
-                    b.Property<long>("NovelId")
-                        .HasColumnType("bigint");
-
                     b.Property<long>("Order")
                         .HasColumnType("bigint");
 
@@ -165,13 +162,17 @@ namespace FictionArchive.Service.NovelService.Migrations
                     b.Property<string>("Url")
                         .HasColumnType("text");
 
+                    b.Property<long>("VolumeId")
+                        .HasColumnType("bigint");
+
                     b.HasKey("Id");
 
                     b.HasIndex("BodyId");
 
                     b.HasIndex("NameId");
 
-                    b.HasIndex("NovelId");
+                    b.HasIndex("VolumeId", "Order")
+                        .IsUnique();
 
                     b.ToTable("Chapter");
                 });
@@ -357,6 +358,39 @@ namespace FictionArchive.Service.NovelService.Migrations
                     b.ToTable("TranslationEngines");
                 });
 
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Volume", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid>("NameId")
+                        .HasColumnType("uuid");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("Order")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NameId");
+
+                    b.HasIndex("NovelId", "Order")
+                        .IsUnique();
+
+                    b.ToTable("Volume");
+                });
+
             modelBuilder.Entity("NovelNovelTag", b =>
                 {
                     b.Property<long>("NovelsId")
@@ -427,9 +461,9 @@ namespace FictionArchive.Service.NovelService.Migrations
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Novel", "Novel")
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Volume", "Volume")
                         .WithMany("Chapters")
-                        .HasForeignKey("NovelId")
+                        .HasForeignKey("VolumeId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
@@ -437,7 +471,7 @@ namespace FictionArchive.Service.NovelService.Migrations
 
                     b.Navigation("Name");
 
-                    b.Navigation("Novel");
+                    b.Navigation("Volume");
                 });
 
             modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Novel", b =>
@@ -509,6 +543,25 @@ namespace FictionArchive.Service.NovelService.Migrations
                     b.Navigation("Name");
                 });
 
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Volume", b =>
+                {
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Localization.LocalizationKey", "Name")
+                        .WithMany()
+                        .HasForeignKey("NameId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Novel", "Novel")
+                        .WithMany("Volumes")
+                        .HasForeignKey("NovelId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Name");
+
+                    b.Navigation("Novel");
+                });
+
             modelBuilder.Entity("NovelNovelTag", b =>
                 {
                     b.HasOne("FictionArchive.Service.NovelService.Models.Novels.Novel", null)
@@ -535,6 +588,11 @@ namespace FictionArchive.Service.NovelService.Migrations
                 });
 
             modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Novel", b =>
+                {
+                    b.Navigation("Volumes");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.NovelService.Models.Novels.Volume", b =>
                 {
                     b.Navigation("Chapters");
                 });

FictionArchive.Service.NovelService/Models/DTOs/ChapterReaderDto.cs

@@ -12,7 +12,16 @@ public class ChapterReaderDto : BaseDto<uint>
     // Navigation context
     public uint NovelId { get; init; }
     public required string NovelName { get; init; }
-    public int TotalChapters { get; init; }
+
+    // Volume context
+    public uint VolumeId { get; init; }
+    public required string VolumeName { get; init; }
+    public int VolumeOrder { get; init; }
+    public int TotalChaptersInVolume { get; init; }
+
+    // Cross-volume navigation (VolumeOrder + ChapterOrder identify a chapter)
+    public int? PrevChapterVolumeOrder { get; init; }
     public uint? PrevChapterOrder { get; init; }
+    public int? NextChapterVolumeOrder { get; init; }
     public uint? NextChapterOrder { get; init; }
 }

FictionArchive.Service.NovelService/Models/DTOs/NovelDto.cs

@@ -14,7 +14,7 @@ public class NovelDto : BaseDto<uint>
     public required string ExternalId { get; init; }
     public required string Name { get; init; }
     public required string Description { get; init; }
-    public required List<ChapterDto> Chapters { get; init; }
+    public required List<VolumeDto> Volumes { get; init; }
     public required List<NovelTagDto> Tags { get; init; }
     public ImageDto? CoverImage { get; init; }
 }

FictionArchive.Service.NovelService/Models/DTOs/VolumeDto.cs

@@ -0,0 +1,8 @@
+namespace FictionArchive.Service.NovelService.Models.DTOs;
+
+public class VolumeDto : BaseDto<uint>
+{
+    public int Order { get; init; }
+    public required string Name { get; init; }
+    public required List<ChapterDto> Chapters { get; init; }
+}

FictionArchive.Service.NovelService/Models/IntegrationEvents/ChapterCreatedEvent.cs

@@ -0,0 +1,13 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+
+namespace FictionArchive.Service.NovelService.Models.IntegrationEvents;
+
+public class ChapterCreatedEvent : IIntegrationEvent
+{
+    public required uint ChapterId { get; init; }
+    public required uint NovelId { get; init; }
+    public required uint VolumeId { get; init; }
+    public required int VolumeOrder { get; init; }
+    public required uint ChapterOrder { get; init; }
+    public required string ChapterTitle { get; init; }
+}

FictionArchive.Service.NovelService/Models/IntegrationEvents/ChapterPullRequestedEvent.cs

@@ -5,5 +5,6 @@ namespace FictionArchive.Service.NovelService.Models.IntegrationEvents;
 public class ChapterPullRequestedEvent : IIntegrationEvent
 {
     public uint NovelId { get; set; }
-    public uint ChapterNumber { get; set; }
+    public uint VolumeId { get; set; }
+    public uint ChapterOrder { get; set; }
 }

FictionArchive.Service.NovelService/Models/IntegrationEvents/NovelCreatedEvent.cs

@@ -0,0 +1,13 @@
+using FictionArchive.Common.Enums;
+using FictionArchive.Service.Shared.Services.EventBus;
+
+namespace FictionArchive.Service.NovelService.Models.IntegrationEvents;
+
+public class NovelCreatedEvent : IIntegrationEvent
+{
+    public required uint NovelId { get; init; }
+    public required string Title { get; init; }
+    public required Language OriginalLanguage { get; init; }
+    public required string Source { get; init; }
+    public required string AuthorName { get; init; }
+}

FictionArchive.Service.NovelService/Models/Novels/Chapter.cs

@@ -20,7 +20,7 @@ public class Chapter : BaseEntity<uint>
     
     #region Navigation Properties
 
-    public Novel Novel { get; set; }
+    public Volume Volume { get; set; }
 
     #endregion
 }

FictionArchive.Service.NovelService/Models/Novels/Novel.cs

@@ -21,7 +21,7 @@ public class Novel : BaseEntity<uint>
     public LocalizationKey Name { get; set; }
     public LocalizationKey Description { get; set; }
     
-    public List<Chapter> Chapters { get; set; }
+    public List<Volume> Volumes { get; set; }
     public List<NovelTag> Tags { get; set; }
     public Image? CoverImage { get; set; }
 }

FictionArchive.Service.NovelService/Models/Novels/Volume.cs

@@ -0,0 +1,24 @@
+using System.ComponentModel.DataAnnotations.Schema;
+using FictionArchive.Service.NovelService.Models.Localization;
+using FictionArchive.Service.Shared.Models;
+
+namespace FictionArchive.Service.NovelService.Models.Novels;
+
+[Table("Volume")]
+public class Volume : BaseEntity<uint>
+{
+    /// <summary>
+    /// Signed int to allow special ordering like -1 for "Author Notes" at top.
+    /// </summary>
+    public int Order { get; set; }
+
+    public LocalizationKey Name { get; set; }
+
+    public List<Chapter> Chapters { get; set; }
+
+    #region Navigation Properties
+
+    public Novel Novel { get; set; }
+
+    #endregion
+}

FictionArchive.Service.NovelService/Models/SourceAdapters/NovelMetadata.cs

@@ -16,7 +16,7 @@ public class NovelMetadata
     public Language RawLanguage { get; set; }
     public NovelStatus RawStatus { get; set; }
     
-    public List<ChapterMetadata> Chapters { get; set; }
+    public List<VolumeMetadata> Volumes { get; set; }
     public List<string> SourceTags { get; set; }
     public List<string> SystemTags { get; set; }
     public SourceDescriptor SourceDescriptor { get; set; }

FictionArchive.Service.NovelService/Models/SourceAdapters/VolumeMetadata.cs

@@ -0,0 +1,8 @@
+namespace FictionArchive.Service.NovelService.Models.SourceAdapters;
+
+public class VolumeMetadata
+{
+    public int Order { get; set; }
+    public string Name { get; set; }
+    public List<ChapterMetadata> Chapters { get; set; }
+}

FictionArchive.Service.NovelService/Services/EventHandlers/ChapterPullRequestedEventHandler.cs

@@ -14,6 +14,6 @@ public class ChapterPullRequestedEventHandler : IIntegrationEventHandler<Chapter
 
     public async Task Handle(ChapterPullRequestedEvent @event)
     {
-        await _novelUpdateService.PullChapterContents(@event.NovelId, @event.ChapterNumber);
+        await _novelUpdateService.PullChapterContents(@event.NovelId, @event.VolumeId, @event.ChapterOrder);
     }
 }

FictionArchive.Service.NovelService/Services/NovelServiceDbContext.cs

@@ -10,6 +10,7 @@ public class NovelServiceDbContext(DbContextOptions options, ILogger<NovelServic
     : FictionArchiveDbContext(options, logger)
 {
     public DbSet<Novel> Novels { get; set; }
+    public DbSet<Volume> Volumes { get; set; }
     public DbSet<Chapter> Chapters { get; set; }
     public DbSet<Source> Sources { get; set; }
     public DbSet<TranslationEngine> TranslationEngines { get; set; }
@@ -25,5 +26,15 @@ public class NovelServiceDbContext(DbContextOptions options, ILogger<NovelServic
         modelBuilder.Entity<Novel>()
             .HasIndex("ExternalId", "SourceId")
             .IsUnique();
+
+        // Volume.Order is unique per Novel
+        modelBuilder.Entity<Volume>()
+            .HasIndex("NovelId", "Order")
+            .IsUnique();
+
+        // Chapter.Order is unique per Volume
+        modelBuilder.Entity<Chapter>()
+            .HasIndex("VolumeId", "Order")
+            .IsUnique();
     }
 }

FictionArchive.Service.NovelService/Services/NovelUpdateService.cs

@@ -190,6 +190,48 @@ public class NovelUpdateService
         return existingChapters.Concat(newChapters).ToList();
     }
 
+    private static List<Volume> SynchronizeVolumes(
+        List<VolumeMetadata> metadataVolumes,
+        Language rawLanguage,
+        List<Volume>? existingVolumes)
+    {
+        existingVolumes ??= new List<Volume>();
+        var result = new List<Volume>();
+
+        foreach (var metaVolume in metadataVolumes)
+        {
+            // Match volumes by Order (unique per novel)
+            var existingVolume = existingVolumes.FirstOrDefault(v => v.Order == metaVolume.Order);
+
+            if (existingVolume != null)
+            {
+                // Volume exists - sync its chapters
+                existingVolume.Chapters = SynchronizeChapters(
+                    metaVolume.Chapters,
+                    rawLanguage,
+                    existingVolume.Chapters);
+                result.Add(existingVolume);
+            }
+            else
+            {
+                // New volume - create it with synced chapters
+                var newVolume = new Volume
+                {
+                    Order = metaVolume.Order,
+                    Name = LocalizationKey.CreateFromText(metaVolume.Name, rawLanguage),
+                    Chapters = SynchronizeChapters(metaVolume.Chapters, rawLanguage, null)
+                };
+                result.Add(newVolume);
+            }
+        }
+
+        // Keep existing volumes not in metadata (user-created volumes)
+        var metaOrders = metadataVolumes.Select(v => v.Order).ToHashSet();
+        result.AddRange(existingVolumes.Where(v => !metaOrders.Contains(v.Order)));
+
+        return result;
+    }
+
     private static (Image? image, bool shouldPublishEvent) HandleCoverImage(
         ImageData? newCoverData,
         Image? existingCoverImage)
@@ -232,7 +274,7 @@ public class NovelUpdateService
             metadata.SystemTags,
             metadata.RawLanguage);
 
-        var chapters = SynchronizeChapters(metadata.Chapters, metadata.RawLanguage, null);
+        var volumes = SynchronizeVolumes(metadata.Volumes, metadata.RawLanguage, null);
 
         var novel = new Novel
         {
@@ -243,7 +285,7 @@ public class NovelUpdateService
             CoverImage = metadata.CoverImage != null
                 ? new Image { OriginalPath = metadata.CoverImage.Url }
                 : null,
-            Chapters = chapters,
+            Volumes = volumes,
             Description = LocalizationKey.CreateFromText(metadata.Description, metadata.RawLanguage),
             Name = LocalizationKey.CreateFromText(metadata.Name, metadata.RawLanguage),
             RawStatus = metadata.RawStatus,
@@ -289,7 +331,9 @@ public class NovelUpdateService
             .Include(n => n.Description)
             .ThenInclude(lk => lk.Texts)
             .Include(n => n.Tags)
-            .Include(n => n.Chapters).ThenInclude(chapter => chapter.Body)
+            .Include(n => n.Volumes)
+            .ThenInclude(volume => volume.Chapters)
+            .ThenInclude(chapter => chapter.Body)
             .ThenInclude(localizationKey => localizationKey.Texts)
             .Include(n => n.CoverImage)
             .FirstOrDefaultAsync(n =>
@@ -299,6 +343,12 @@ public class NovelUpdateService
         Novel novel;
         bool shouldPublishCoverEvent;
 
+        // Capture existing chapter IDs to detect new chapters later
+        var existingChapterIds = existingNovel?.Volumes
+            .SelectMany(v => v.Chapters)
+            .Select(c => c.Id)
+            .ToHashSet() ?? new HashSet<uint>();
+
         if (existingNovel == null)
         {
             // CREATE PATH: New novel
@@ -326,11 +376,11 @@ public class NovelUpdateService
                 metadata.SystemTags,
                 metadata.RawLanguage);
 
-            // Synchronize chapters (add only)
-            novel.Chapters = SynchronizeChapters(
-                metadata.Chapters,
+            // Synchronize volumes (and their chapters)
+            novel.Volumes = SynchronizeVolumes(
+                metadata.Volumes,
                 metadata.RawLanguage,
-                existingNovel.Chapters);
+                existingNovel.Volumes);
 
             // Handle cover image
             (novel.CoverImage, shouldPublishCoverEvent) = HandleCoverImage(
@@ -340,6 +390,36 @@ public class NovelUpdateService
 
         await _dbContext.SaveChangesAsync();
 
+        // Publish novel created event for new novels
+        if (existingNovel == null)
+        {
+            await _eventBus.Publish(new NovelCreatedEvent
+            {
+                NovelId = novel.Id,
+                Title = novel.Name.Texts.First(t => t.Language == novel.RawLanguage).Text,
+                OriginalLanguage = novel.RawLanguage,
+                Source = novel.Source.Key,
+                AuthorName = novel.Author.Name.Texts.First(t => t.Language == novel.RawLanguage).Text
+            });
+        }
+
+        // Publish chapter created events for new chapters
+        foreach (var volume in novel.Volumes)
+        {
+            foreach (var chapter in volume.Chapters.Where(c => !existingChapterIds.Contains(c.Id)))
+            {
+                await _eventBus.Publish(new ChapterCreatedEvent
+                {
+                    ChapterId = chapter.Id,
+                    NovelId = novel.Id,
+                    VolumeId = volume.Id,
+                    VolumeOrder = volume.Order,
+                    ChapterOrder = chapter.Order,
+                    ChapterTitle = chapter.Name.Texts.First(t => t.Language == novel.RawLanguage).Text
+                });
+            }
+        }
+
         // Publish cover image event if needed
         if (shouldPublishCoverEvent && novel.CoverImage != null && metadata.CoverImage != null)
         {
@@ -352,31 +432,40 @@ public class NovelUpdateService
         }
 
         // Publish chapter pull events for chapters without body content
-        var chaptersNeedingPull = novel.Chapters
-            .Where(c => c.Body?.Texts == null || !c.Body.Texts.Any())
-            .ToList();
-
-        foreach (var chapter in chaptersNeedingPull)
+        foreach (var volume in novel.Volumes)
         {
-            await _eventBus.Publish(new ChapterPullRequestedEvent
+            var chaptersNeedingPull = volume.Chapters
+                .Where(c => c.Body?.Texts == null || !c.Body.Texts.Any())
+                .ToList();
+
+            foreach (var chapter in chaptersNeedingPull)
             {
-                NovelId = novel.Id,
-                ChapterNumber = chapter.Order
-            });
+                await _eventBus.Publish(new ChapterPullRequestedEvent
+                {
+                    NovelId = novel.Id,
+                    VolumeId = volume.Id,
+                    ChapterOrder = chapter.Order
+                });
+            }
         }
 
         return novel;
     }
 
-    public async Task<Chapter> PullChapterContents(uint novelId, uint chapterNumber)
+    public async Task<Chapter> PullChapterContents(uint novelId, uint volumeId, uint chapterOrder)
     {
         var novel = await _dbContext.Novels.Where(novel => novel.Id == novelId)
-            .Include(novel => novel.Chapters)
+            .Include(novel => novel.Volumes)
+            .ThenInclude(volume => volume.Chapters)
             .ThenInclude(chapter => chapter.Body)
             .ThenInclude(body => body.Texts)
-            .Include(novel => novel.Source).Include(novel => novel.Chapters).ThenInclude(chapter => chapter.Images)
+            .Include(novel => novel.Source)
+            .Include(novel => novel.Volumes)
+            .ThenInclude(volume => volume.Chapters)
+            .ThenInclude(chapter => chapter.Images)
             .FirstOrDefaultAsync();
-        var chapter = novel.Chapters.Where(chapter => chapter.Order == chapterNumber).FirstOrDefault();
+        var volume = novel.Volumes.FirstOrDefault(v => v.Id == volumeId);
+        var chapter = volume.Chapters.FirstOrDefault(c => c.Order == chapterOrder);
         var adapter = _sourceAdapters.FirstOrDefault(adapter => adapter.SourceDescriptor.Key == novel.Source.Key);
         var rawChapter = await adapter.GetRawChapter(chapter.Url);
         
@@ -478,12 +567,13 @@ public class NovelUpdateService
         return importNovelRequestEvent;
     }
 
-    public async Task<ChapterPullRequestedEvent> QueueChapterPull(uint novelId, uint chapterNumber)
+    public async Task<ChapterPullRequestedEvent> QueueChapterPull(uint novelId, uint volumeId, uint chapterOrder)
     {
         var chapterPullEvent = new ChapterPullRequestedEvent()
         {
             NovelId = novelId,
-            ChapterNumber = chapterNumber
+            VolumeId = volumeId,
+            ChapterOrder = chapterOrder
         };
         await _eventBus.Publish(chapterPullEvent);
         return chapterPullEvent;
@@ -495,9 +585,10 @@ public class NovelUpdateService
             .Include(n => n.CoverImage)
             .Include(n => n.Name).ThenInclude(k => k.Texts)
             .Include(n => n.Description).ThenInclude(k => k.Texts)
-            .Include(n => n.Chapters).ThenInclude(c => c.Images)
-            .Include(n => n.Chapters).ThenInclude(c => c.Name).ThenInclude(k => k.Texts)
-            .Include(n => n.Chapters).ThenInclude(c => c.Body).ThenInclude(k => k.Texts)
+            .Include(n => n.Volumes).ThenInclude(v => v.Name).ThenInclude(k => k.Texts)
+            .Include(n => n.Volumes).ThenInclude(v => v.Chapters).ThenInclude(c => c.Images)
+            .Include(n => n.Volumes).ThenInclude(v => v.Chapters).ThenInclude(c => c.Name).ThenInclude(k => k.Texts)
+            .Include(n => n.Volumes).ThenInclude(v => v.Chapters).ThenInclude(c => c.Body).ThenInclude(k => k.Texts)
             .FirstOrDefaultAsync(n => n.Id == novelId);
 
         if (novel == null)
@@ -505,8 +596,12 @@ public class NovelUpdateService
 
         // Collect all LocalizationKey IDs for cleanup
         var locKeyIds = new List<Guid> { novel.Name.Id, novel.Description.Id };
-        locKeyIds.AddRange(novel.Chapters.Select(c => c.Name.Id));
-        locKeyIds.AddRange(novel.Chapters.Select(c => c.Body.Id));
+        foreach (var volume in novel.Volumes)
+        {
+            locKeyIds.Add(volume.Name.Id);
+            locKeyIds.AddRange(volume.Chapters.Select(c => c.Name.Id));
+            locKeyIds.AddRange(volume.Chapters.Select(c => c.Body.Id));
+        }
 
         // 1. Remove LocalizationRequests referencing these keys
         var locRequests = await _dbContext.LocalizationRequests
@@ -517,19 +612,26 @@ public class NovelUpdateService
         // 2. Remove LocalizationTexts (NO ACTION FK - won't cascade)
         _dbContext.RemoveRange(novel.Name.Texts);
         _dbContext.RemoveRange(novel.Description.Texts);
-        foreach (var chapter in novel.Chapters)
+        foreach (var volume in novel.Volumes)
         {
-            _dbContext.RemoveRange(chapter.Name.Texts);
-            _dbContext.RemoveRange(chapter.Body.Texts);
+            _dbContext.RemoveRange(volume.Name.Texts);
+            foreach (var chapter in volume.Chapters)
+            {
+                _dbContext.RemoveRange(chapter.Name.Texts);
+                _dbContext.RemoveRange(chapter.Body.Texts);
+            }
         }
 
         // 3. Remove Images (NO ACTION FK - won't cascade)
         if (novel.CoverImage != null)
             _dbContext.Images.Remove(novel.CoverImage);
-        foreach (var chapter in novel.Chapters)
-            _dbContext.Images.RemoveRange(chapter.Images);
+        foreach (var volume in novel.Volumes)
+        {
+            foreach (var chapter in volume.Chapters)
+                _dbContext.Images.RemoveRange(chapter.Images);
+        }
 
-        // 4. Remove novel - cascades: chapters, localization keys, tag mappings
+        // 4. Remove novel - cascades: volumes, chapters, localization keys, tag mappings
         _dbContext.Novels.Remove(novel);
         await _dbContext.SaveChangesAsync();
     }

FictionArchive.Service.NovelService/Services/SourceAdapters/Novelpia/NovelpiaAdapter.cs

@@ -66,7 +66,7 @@ public class NovelpiaAdapter : ISourceAdapter
             ExternalId = novelId.ToString(),
             SystemTags = new List<string>(),
             SourceTags = new List<string>(),
-            Chapters = new List<ChapterMetadata>(),
+            Volumes = new List<VolumeMetadata>(),
             SourceDescriptor = SourceDescriptor
         };
         
@@ -133,6 +133,9 @@ public class NovelpiaAdapter : ISourceAdapter
             novel.SourceTags.Add(tag);
         }
 
+        // Author's posts (from notice_table in the page HTML)
+        var authorsPosts = ParseAuthorsPosts(novelData);
+
         // Chapters
         uint page = 0;
         List<ChapterMetadata> chapters = new List<ChapterMetadata>();
@@ -168,7 +171,25 @@ public class NovelpiaAdapter : ISourceAdapter
             }
             page++;
         }
-        novel.Chapters = chapters;
+
+        // Add Author's Posts volume if there are any
+        if (authorsPosts.Count > 0)
+        {
+            novel.Volumes.Add(new VolumeMetadata
+            {
+                Order = 0,
+                Name = "Author's Posts",
+                Chapters = authorsPosts
+            });
+        }
+
+        // Main Story volume
+        novel.Volumes.Add(new VolumeMetadata
+        {
+            Order = 1,
+            Name = "Main Story",
+            Chapters = chapters
+        });
 
         return novel;
     }
@@ -241,4 +262,40 @@ public class NovelpiaAdapter : ISourceAdapter
         }
         return await image.Content.ReadAsByteArrayAsync();
     }
+
+    private List<ChapterMetadata> ParseAuthorsPosts(string novelHtml)
+    {
+        var posts = new List<ChapterMetadata>();
+
+        // Find the notice_table section
+        var noticeTableMatch = Regex.Match(novelHtml,
+            @"(?s)<table[^>]*class=""notice_table[^""]*""[^>]*>(.*?)</table>");
+        if (!noticeTableMatch.Success)
+            return posts;
+
+        var tableContent = noticeTableMatch.Groups[1].Value;
+
+        // Find all td elements with onclick containing viewer URL and extract title from <b>
+        // HTML structure: <td ... onclick="...location='/viewer/3330612';"><b>Title</b>
+        var postMatches = Regex.Matches(tableContent,
+            @"onclick=""[^""]*location='/viewer/(\d+)'[^""]*""[^>]*><b>([^<]+)</b>");
+
+        uint order = 1;
+        foreach (Match match in postMatches)
+        {
+            string viewerId = match.Groups[1].Value;
+            string title = WebUtility.HtmlDecode(match.Groups[2].Value.Trim());
+
+            posts.Add(new ChapterMetadata
+            {
+                Revision = 0,
+                Order = order,
+                Url = $"https://novelpia.com/viewer/{viewerId}",
+                Name = title
+            });
+            order++;
+        }
+
+        return posts;
+    }
 }

FictionArchive.Service.Shared/Extensions/AuthenticationExtensions.cs

@@ -6,6 +6,7 @@ using Microsoft.IdentityModel.Tokens;
 using FictionArchive.Service.Shared.Constants;
 using FictionArchive.Service.Shared.Models.Authentication;
 using System.Linq;
+using System.Security.Claims;
 
 namespace FictionArchive.Service.Shared.Extensions;
 
@@ -78,7 +79,7 @@ public static class AuthenticationExtensions
 
                 logger.LogDebug(
                     "JWT token validated for subject: {Subject}",
-                    context.Principal?.FindFirst("sub")?.Value ?? "unknown");
+                    context.Principal?.FindFirst(ClaimTypes.NameIdentifier)?.Value ?? "unknown");
 
                 return existingEvents?.OnTokenValidated?.Invoke(context) ?? Task.CompletedTask;
             }

FictionArchive.Service.UserNovelDataService/Dockerfile

@@ -0,0 +1,23 @@
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+USER $APP_UID
+WORKDIR /app
+EXPOSE 8080
+EXPOSE 8081
+
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+ARG BUILD_CONFIGURATION=Release
+WORKDIR /src
+COPY ["FictionArchive.Service.UserNovelDataService/FictionArchive.Service.UserNovelDataService.csproj", "FictionArchive.Service.UserNovelDataService/"]
+RUN dotnet restore "FictionArchive.Service.UserNovelDataService/FictionArchive.Service.UserNovelDataService.csproj"
+COPY . .
+WORKDIR "/src/FictionArchive.Service.UserNovelDataService"
+RUN dotnet build "./FictionArchive.Service.UserNovelDataService.csproj" -c $BUILD_CONFIGURATION -o /app/build
+
+FROM build AS publish
+ARG BUILD_CONFIGURATION=Release
+RUN dotnet publish "./FictionArchive.Service.UserNovelDataService.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false
+
+FROM base AS final
+WORKDIR /app
+COPY --from=publish /app/publish .
+ENTRYPOINT ["dotnet", "FictionArchive.Service.UserNovelDataService.dll"]

FictionArchive.Service.UserNovelDataService/FictionArchive.Service.UserNovelDataService.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.11">
+          <PrivateAssets>all</PrivateAssets>
+          <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+    </ItemGroup>
+
+    <ItemGroup>
+      <Content Include="..\.dockerignore">
+        <Link>.dockerignore</Link>
+      </Content>
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\FictionArchive.Service.Shared\FictionArchive.Service.Shared.csproj" />
+    </ItemGroup>
+
+</Project>

FictionArchive.Service.UserNovelDataService/GraphQL/Mutation.cs

@@ -0,0 +1,498 @@
+using System.Security.Claims;
+using FictionArchive.Service.UserNovelDataService.Models.Database;
+using FictionArchive.Service.UserNovelDataService.Models.DTOs;
+using FictionArchive.Service.UserNovelDataService.Services;
+using HotChocolate.Authorization;
+using HotChocolate.Types;
+using Microsoft.EntityFrameworkCore;
+
+namespace FictionArchive.Service.UserNovelDataService.GraphQL;
+
+public class Mutation
+{
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<BookmarkPayload> UpsertBookmark(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        UpsertBookmarkInput input)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        var user = await dbContext.Users
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            // Auto-create user if not exists
+            user = new User { OAuthProviderId = oAuthProviderId };
+            dbContext.Users.Add(user);
+            await dbContext.SaveChangesAsync();
+        }
+
+        var existingBookmark = await dbContext.Bookmarks
+            .FirstOrDefaultAsync(b => b.UserId == user.Id && b.ChapterId == input.ChapterId);
+
+        if (existingBookmark != null)
+        {
+            // Update existing
+            existingBookmark.Description = input.Description;
+        }
+        else
+        {
+            // Create new
+            existingBookmark = new Bookmark
+            {
+                UserId = user.Id,
+                NovelId = input.NovelId,
+                ChapterId = input.ChapterId,
+                Description = input.Description
+            };
+            dbContext.Bookmarks.Add(existingBookmark);
+        }
+
+        await dbContext.SaveChangesAsync();
+
+        return new BookmarkPayload
+        {
+            Success = true,
+            Bookmark = new BookmarkDto
+            {
+                Id = existingBookmark.Id,
+                ChapterId = existingBookmark.ChapterId,
+                NovelId = existingBookmark.NovelId,
+                Description = existingBookmark.Description,
+                CreatedTime = existingBookmark.CreatedTime
+            }
+        };
+    }
+
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<BookmarkPayload> RemoveBookmark(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        uint chapterId)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            return new BookmarkPayload { Success = false };
+        }
+
+        var bookmark = await dbContext.Bookmarks
+            .FirstOrDefaultAsync(b => b.UserId == user.Id && b.ChapterId == chapterId);
+
+        if (bookmark == null)
+        {
+            return new BookmarkPayload { Success = false };
+        }
+
+        dbContext.Bookmarks.Remove(bookmark);
+        await dbContext.SaveChangesAsync();
+
+        return new BookmarkPayload { Success = true };
+    }
+
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<ReadingListPayload> CreateReadingList(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        CreateReadingListInput input)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        if (string.IsNullOrWhiteSpace(input.Name))
+        {
+            throw new InvalidOperationException("Reading list name is required");
+        }
+
+        var user = await dbContext.Users
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            user = new User { OAuthProviderId = oAuthProviderId };
+            dbContext.Users.Add(user);
+            await dbContext.SaveChangesAsync();
+        }
+
+        var readingList = new ReadingList
+        {
+            UserId = user.Id,
+            Name = input.Name.Trim(),
+            Description = input.Description?.Trim()
+        };
+
+        dbContext.ReadingLists.Add(readingList);
+        await dbContext.SaveChangesAsync();
+
+        return new ReadingListPayload
+        {
+            Success = true,
+            ReadingList = new ReadingListDto
+            {
+                Id = readingList.Id,
+                Name = readingList.Name,
+                Description = readingList.Description,
+                Items = [],
+                ItemCount = 0,
+                CreatedTime = readingList.CreatedTime
+            }
+        };
+    }
+
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<ReadingListPayload> UpdateReadingList(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        UpdateReadingListInput input)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        if (string.IsNullOrWhiteSpace(input.Name))
+        {
+            throw new InvalidOperationException("Reading list name is required");
+        }
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            return new ReadingListPayload { Success = false };
+        }
+
+        var readingList = await dbContext.ReadingLists
+            .Include(r => r.Items)
+            .FirstOrDefaultAsync(r => r.Id == input.Id && r.UserId == user.Id);
+
+        if (readingList == null)
+        {
+            return new ReadingListPayload { Success = false };
+        }
+
+        readingList.Name = input.Name.Trim();
+        readingList.Description = input.Description?.Trim();
+
+        await dbContext.SaveChangesAsync();
+
+        return new ReadingListPayload
+        {
+            Success = true,
+            ReadingList = new ReadingListDto
+            {
+                Id = readingList.Id,
+                Name = readingList.Name,
+                Description = readingList.Description,
+                Items = readingList.Items.OrderBy(i => i.Order).Select(i => new ReadingListItemDto
+                {
+                    NovelId = i.NovelId,
+                    Order = i.Order,
+                    AddedTime = i.CreatedTime
+                }),
+                ItemCount = readingList.Items.Count,
+                CreatedTime = readingList.CreatedTime
+            }
+        };
+    }
+
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<DeleteReadingListPayload> DeleteReadingList(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        int id)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            return new DeleteReadingListPayload { Success = false };
+        }
+
+        var readingList = await dbContext.ReadingLists
+            .FirstOrDefaultAsync(r => r.Id == id && r.UserId == user.Id);
+
+        if (readingList == null)
+        {
+            return new DeleteReadingListPayload { Success = false };
+        }
+
+        dbContext.ReadingLists.Remove(readingList);
+        await dbContext.SaveChangesAsync();
+
+        return new DeleteReadingListPayload { Success = true };
+    }
+
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<ReadingListPayload> AddToReadingList(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        AddToReadingListInput input)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            return new ReadingListPayload { Success = false };
+        }
+
+        var readingList = await dbContext.ReadingLists
+            .Include(r => r.Items)
+            .FirstOrDefaultAsync(r => r.Id == input.ReadingListId && r.UserId == user.Id);
+
+        if (readingList == null)
+        {
+            return new ReadingListPayload { Success = false };
+        }
+
+        // Idempotent: if already in list, return success
+        var existingItem = readingList.Items.FirstOrDefault(i => i.NovelId == input.NovelId);
+        if (existingItem != null)
+        {
+            return new ReadingListPayload
+            {
+                Success = true,
+                ReadingList = new ReadingListDto
+                {
+                    Id = readingList.Id,
+                    Name = readingList.Name,
+                    Description = readingList.Description,
+                    Items = readingList.Items.OrderBy(i => i.Order).Select(i => new ReadingListItemDto
+                    {
+                        NovelId = i.NovelId,
+                        Order = i.Order,
+                        AddedTime = i.CreatedTime
+                    }),
+                    ItemCount = readingList.Items.Count,
+                    CreatedTime = readingList.CreatedTime
+                }
+            };
+        }
+
+        // Add at the end (highest order + 1)
+        var maxOrder = readingList.Items.Any() ? readingList.Items.Max(i => i.Order) : -1;
+        var newItem = new ReadingListItem
+        {
+            ReadingListId = readingList.Id,
+            NovelId = input.NovelId,
+            Order = maxOrder + 1
+        };
+
+        dbContext.ReadingListItems.Add(newItem);
+        await dbContext.SaveChangesAsync();
+
+        // Reload to get updated items
+        readingList = await dbContext.ReadingLists
+            .AsNoTracking()
+            .Include(r => r.Items.OrderBy(i => i.Order))
+            .FirstAsync(r => r.Id == input.ReadingListId);
+
+        return new ReadingListPayload
+        {
+            Success = true,
+            ReadingList = new ReadingListDto
+            {
+                Id = readingList.Id,
+                Name = readingList.Name,
+                Description = readingList.Description,
+                Items = readingList.Items.Select(i => new ReadingListItemDto
+                {
+                    NovelId = i.NovelId,
+                    Order = i.Order,
+                    AddedTime = i.CreatedTime
+                }),
+                ItemCount = readingList.Items.Count,
+                CreatedTime = readingList.CreatedTime
+            }
+        };
+    }
+
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<ReadingListPayload> RemoveFromReadingList(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        int listId,
+        uint novelId)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            return new ReadingListPayload { Success = false };
+        }
+
+        var readingList = await dbContext.ReadingLists
+            .Include(r => r.Items)
+            .FirstOrDefaultAsync(r => r.Id == listId && r.UserId == user.Id);
+
+        if (readingList == null)
+        {
+            return new ReadingListPayload { Success = false };
+        }
+
+        var item = readingList.Items.FirstOrDefault(i => i.NovelId == novelId);
+        if (item != null)
+        {
+            dbContext.ReadingListItems.Remove(item);
+            await dbContext.SaveChangesAsync();
+        }
+
+        // Reload to get updated items
+        readingList = await dbContext.ReadingLists
+            .AsNoTracking()
+            .Include(r => r.Items.OrderBy(i => i.Order))
+            .FirstAsync(r => r.Id == listId);
+
+        return new ReadingListPayload
+        {
+            Success = true,
+            ReadingList = new ReadingListDto
+            {
+                Id = readingList.Id,
+                Name = readingList.Name,
+                Description = readingList.Description,
+                Items = readingList.Items.Select(i => new ReadingListItemDto
+                {
+                    NovelId = i.NovelId,
+                    Order = i.Order,
+                    AddedTime = i.CreatedTime
+                }),
+                ItemCount = readingList.Items.Count,
+                CreatedTime = readingList.CreatedTime
+            }
+        };
+    }
+
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<ReadingListPayload> ReorderReadingListItem(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        ReorderReadingListItemInput input)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            return new ReadingListPayload { Success = false };
+        }
+
+        var readingList = await dbContext.ReadingLists
+            .Include(r => r.Items)
+            .FirstOrDefaultAsync(r => r.Id == input.ReadingListId && r.UserId == user.Id);
+
+        if (readingList == null)
+        {
+            return new ReadingListPayload { Success = false };
+        }
+
+        var item = readingList.Items.FirstOrDefault(i => i.NovelId == input.NovelId);
+        if (item == null)
+        {
+            throw new InvalidOperationException("Novel not found in reading list");
+        }
+
+        var oldOrder = item.Order;
+        var newOrder = input.NewOrder;
+
+        // Shift other items
+        if (newOrder < oldOrder)
+        {
+            // Moving up: shift items between newOrder and oldOrder down
+            foreach (var i in readingList.Items.Where(x => x.Order >= newOrder && x.Order < oldOrder))
+            {
+                i.Order++;
+            }
+        }
+        else if (newOrder > oldOrder)
+        {
+            // Moving down: shift items between oldOrder and newOrder up
+            foreach (var i in readingList.Items.Where(x => x.Order > oldOrder && x.Order <= newOrder))
+            {
+                i.Order--;
+            }
+        }
+
+        item.Order = newOrder;
+        await dbContext.SaveChangesAsync();
+
+        return new ReadingListPayload
+        {
+            Success = true,
+            ReadingList = new ReadingListDto
+            {
+                Id = readingList.Id,
+                Name = readingList.Name,
+                Description = readingList.Description,
+                Items = readingList.Items.OrderBy(i => i.Order).Select(i => new ReadingListItemDto
+                {
+                    NovelId = i.NovelId,
+                    Order = i.Order,
+                    AddedTime = i.CreatedTime
+                }),
+                ItemCount = readingList.Items.Count,
+                CreatedTime = readingList.CreatedTime
+            }
+        };
+    }
+}

FictionArchive.Service.UserNovelDataService/GraphQL/Query.cs

@@ -0,0 +1,136 @@
+using System.Security.Claims;
+using FictionArchive.Service.UserNovelDataService.Models.Database;
+using FictionArchive.Service.UserNovelDataService.Models.DTOs;
+using FictionArchive.Service.UserNovelDataService.Services;
+using HotChocolate.Authorization;
+using Microsoft.EntityFrameworkCore;
+
+namespace FictionArchive.Service.UserNovelDataService.GraphQL;
+
+public class Query
+{
+    [Authorize]
+    public async Task<IQueryable<BookmarkDto>> GetBookmarks(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        uint novelId)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            return new List<BookmarkDto>().AsQueryable();
+        }
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            return new List<BookmarkDto>().AsQueryable();
+        }
+
+        return dbContext.Bookmarks
+            .AsNoTracking()
+            .Where(b => b.UserId == user.Id && b.NovelId == novelId)
+            .OrderByDescending(b => b.CreatedTime)
+            .Select(b => new BookmarkDto
+            {
+                Id = b.Id,
+                ChapterId = b.ChapterId,
+                NovelId = b.NovelId,
+                Description = b.Description,
+                CreatedTime = b.CreatedTime
+            });
+    }
+
+    [Authorize]
+    public async Task<IEnumerable<ReadingListDto>> GetReadingLists(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            return [];
+        }
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            return [];
+        }
+
+        var lists = await dbContext.ReadingLists
+            .AsNoTracking()
+            .Include(r => r.Items)
+            .Where(r => r.UserId == user.Id)
+            .OrderByDescending(r => r.LastUpdatedTime)
+            .ToListAsync();
+
+        return lists.Select(r => new ReadingListDto
+        {
+            Id = r.Id,
+            Name = r.Name,
+            Description = r.Description,
+            ItemCount = r.Items.Count,
+            Items = r.Items.Select(i => new ReadingListItemDto
+            {
+                NovelId = i.NovelId,
+                Order = i.Order,
+                AddedTime = i.CreatedTime
+            }),
+            CreatedTime = r.CreatedTime
+        });
+    }
+
+    [Authorize]
+    public async Task<ReadingListDto?> GetReadingList(
+        UserNovelDataServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal,
+        int id)
+    {
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            return null;
+        }
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+
+        if (user == null)
+        {
+            return null;
+        }
+
+        var readingList = await dbContext.ReadingLists
+            .AsNoTracking()
+            .Include(r => r.Items.OrderBy(i => i.Order))
+            .FirstOrDefaultAsync(r => r.Id == id && r.UserId == user.Id);
+
+        if (readingList == null)
+        {
+            return null;
+        }
+
+        return new ReadingListDto
+        {
+            Id = readingList.Id,
+            Name = readingList.Name,
+            Description = readingList.Description,
+            ItemCount = readingList.Items.Count,
+            Items = readingList.Items.Select(i => new ReadingListItemDto
+            {
+                NovelId = i.NovelId,
+                Order = i.Order,
+                AddedTime = i.CreatedTime
+            }),
+            CreatedTime = readingList.CreatedTime
+        };
+    }
+}

FictionArchive.Service.UserNovelDataService/Migrations/20251230181559_AddBookmarks.Designer.cs

@@ -0,0 +1,99 @@
+// <auto-generated />
+using System;
+using FictionArchive.Service.UserNovelDataService.Services;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.UserNovelDataService.Migrations
+{
+    [DbContext(typeof(UserNovelDataServiceDbContext))]
+    [Migration("20251230181559_AddBookmarks")]
+    partial class AddBookmarks
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.11")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Bookmark", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<long>("ChapterId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId", "ChapterId")
+                        .IsUnique();
+
+                    b.HasIndex("UserId", "NovelId");
+
+                    b.ToTable("Bookmarks");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.User", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("OAuthProviderId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Bookmark", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

FictionArchive.Service.UserNovelDataService/Migrations/20251230181559_AddBookmarks.cs

@@ -0,0 +1,76 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.UserNovelDataService.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddBookmarks : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Users",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    OAuthProviderId = table.Column<string>(type: "text", nullable: false),
+                    CreatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    LastUpdatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Users", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Bookmarks",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    UserId = table.Column<Guid>(type: "uuid", nullable: false),
+                    ChapterId = table.Column<long>(type: "bigint", nullable: false),
+                    NovelId = table.Column<long>(type: "bigint", nullable: false),
+                    Description = table.Column<string>(type: "text", nullable: true),
+                    CreatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    LastUpdatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Bookmarks", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Bookmarks_Users_UserId",
+                        column: x => x.UserId,
+                        principalTable: "Users",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Bookmarks_UserId_ChapterId",
+                table: "Bookmarks",
+                columns: new[] { "UserId", "ChapterId" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Bookmarks_UserId_NovelId",
+                table: "Bookmarks",
+                columns: new[] { "UserId", "NovelId" });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Bookmarks");
+
+            migrationBuilder.DropTable(
+                name: "Users");
+        }
+    }
+}

FictionArchive.Service.UserNovelDataService/Migrations/20260119184741_AddNovelVolumeChapter.Designer.cs

@@ -0,0 +1,198 @@
+// <auto-generated />
+using System;
+using FictionArchive.Service.UserNovelDataService.Services;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.UserNovelDataService.Migrations
+{
+    [DbContext(typeof(UserNovelDataServiceDbContext))]
+    [Migration("20260119184741_AddNovelVolumeChapter")]
+    partial class AddNovelVolumeChapter
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.11")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Bookmark", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<long>("ChapterId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId", "ChapterId")
+                        .IsUnique();
+
+                    b.HasIndex("UserId", "NovelId");
+
+                    b.ToTable("Bookmarks");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Chapter", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("VolumeId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("VolumeId");
+
+                    b.ToTable("Chapters");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Novel", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Novels");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.User", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("OAuthProviderId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NovelId");
+
+                    b.ToTable("Volumes");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Bookmark", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Chapter", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", "Volume")
+                        .WithMany("Chapters")
+                        .HasForeignKey("VolumeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Volume");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.Novel", "Novel")
+                        .WithMany("Volumes")
+                        .HasForeignKey("NovelId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Novel");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Novel", b =>
+                {
+                    b.Navigation("Volumes");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", b =>
+                {
+                    b.Navigation("Chapters");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

FictionArchive.Service.UserNovelDataService/Migrations/20260119184741_AddNovelVolumeChapter.cs

@@ -0,0 +1,95 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.UserNovelDataService.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddNovelVolumeChapter : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Novels",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    CreatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    LastUpdatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Novels", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Volumes",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    NovelId = table.Column<long>(type: "bigint", nullable: false),
+                    CreatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    LastUpdatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Volumes", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Volumes_Novels_NovelId",
+                        column: x => x.NovelId,
+                        principalTable: "Novels",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Chapters",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    VolumeId = table.Column<long>(type: "bigint", nullable: false),
+                    CreatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    LastUpdatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Chapters", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Chapters_Volumes_VolumeId",
+                        column: x => x.VolumeId,
+                        principalTable: "Volumes",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Chapters_VolumeId",
+                table: "Chapters",
+                column: "VolumeId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Volumes_NovelId",
+                table: "Volumes",
+                column: "NovelId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Chapters");
+
+            migrationBuilder.DropTable(
+                name: "Volumes");
+
+            migrationBuilder.DropTable(
+                name: "Novels");
+        }
+    }
+}

FictionArchive.Service.UserNovelDataService/Migrations/20260120014840_AddReadingLists.Designer.cs

@@ -0,0 +1,289 @@
+// <auto-generated />
+using System;
+using FictionArchive.Service.UserNovelDataService.Services;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.UserNovelDataService.Migrations
+{
+    [DbContext(typeof(UserNovelDataServiceDbContext))]
+    [Migration("20260120014840_AddReadingLists")]
+    partial class AddReadingLists
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.11")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Bookmark", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<long>("ChapterId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId", "ChapterId")
+                        .IsUnique();
+
+                    b.HasIndex("UserId", "NovelId");
+
+                    b.ToTable("Bookmarks");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Chapter", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("VolumeId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("VolumeId");
+
+                    b.ToTable("Chapters");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Novel", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Novels");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingList", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("ReadingLists");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingListItem", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("Order")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ReadingListId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ReadingListId", "NovelId")
+                        .IsUnique();
+
+                    b.HasIndex("ReadingListId", "Order");
+
+                    b.ToTable("ReadingListItems");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.User", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("OAuthProviderId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NovelId");
+
+                    b.ToTable("Volumes");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Bookmark", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Chapter", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", "Volume")
+                        .WithMany("Chapters")
+                        .HasForeignKey("VolumeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Volume");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingList", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingListItem", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingList", "ReadingList")
+                        .WithMany("Items")
+                        .HasForeignKey("ReadingListId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ReadingList");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.Novel", "Novel")
+                        .WithMany("Volumes")
+                        .HasForeignKey("NovelId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Novel");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Novel", b =>
+                {
+                    b.Navigation("Volumes");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingList", b =>
+                {
+                    b.Navigation("Items");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", b =>
+                {
+                    b.Navigation("Chapters");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

FictionArchive.Service.UserNovelDataService/Migrations/20260120014840_AddReadingLists.cs

@@ -0,0 +1,89 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.UserNovelDataService.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddReadingLists : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "ReadingLists",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    UserId = table.Column<Guid>(type: "uuid", nullable: false),
+                    Name = table.Column<string>(type: "text", nullable: false),
+                    Description = table.Column<string>(type: "text", nullable: true),
+                    CreatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    LastUpdatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ReadingLists", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_ReadingLists_Users_UserId",
+                        column: x => x.UserId,
+                        principalTable: "Users",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "ReadingListItems",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    ReadingListId = table.Column<int>(type: "integer", nullable: false),
+                    NovelId = table.Column<long>(type: "bigint", nullable: false),
+                    Order = table.Column<int>(type: "integer", nullable: false),
+                    CreatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    LastUpdatedTime = table.Column<Instant>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ReadingListItems", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_ReadingListItems_ReadingLists_ReadingListId",
+                        column: x => x.ReadingListId,
+                        principalTable: "ReadingLists",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReadingListItems_ReadingListId_NovelId",
+                table: "ReadingListItems",
+                columns: new[] { "ReadingListId", "NovelId" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReadingListItems_ReadingListId_Order",
+                table: "ReadingListItems",
+                columns: new[] { "ReadingListId", "Order" });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReadingLists_UserId",
+                table: "ReadingLists",
+                column: "UserId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "ReadingListItems");
+
+            migrationBuilder.DropTable(
+                name: "ReadingLists");
+        }
+    }
+}

FictionArchive.Service.UserNovelDataService/Migrations/UserNovelDataServiceDbContextModelSnapshot.cs

@@ -0,0 +1,286 @@
+// <auto-generated />
+using System;
+using FictionArchive.Service.UserNovelDataService.Services;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.UserNovelDataService.Migrations
+{
+    [DbContext(typeof(UserNovelDataServiceDbContext))]
+    partial class UserNovelDataServiceDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.11")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Bookmark", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<long>("ChapterId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId", "ChapterId")
+                        .IsUnique();
+
+                    b.HasIndex("UserId", "NovelId");
+
+                    b.ToTable("Bookmarks");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Chapter", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("VolumeId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("VolumeId");
+
+                    b.ToTable("Chapters");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Novel", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Novels");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingList", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("ReadingLists");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingListItem", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("Order")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ReadingListId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ReadingListId", "NovelId")
+                        .IsUnique();
+
+                    b.HasIndex("ReadingListId", "Order");
+
+                    b.ToTable("ReadingListItems");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.User", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("OAuthProviderId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("NovelId")
+                        .HasColumnType("bigint");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NovelId");
+
+                    b.ToTable("Volumes");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Bookmark", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Chapter", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", "Volume")
+                        .WithMany("Chapters")
+                        .HasForeignKey("VolumeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Volume");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingList", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingListItem", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingList", "ReadingList")
+                        .WithMany("Items")
+                        .HasForeignKey("ReadingListId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ReadingList");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserNovelDataService.Models.Database.Novel", "Novel")
+                        .WithMany("Volumes")
+                        .HasForeignKey("NovelId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Novel");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Novel", b =>
+                {
+                    b.Navigation("Volumes");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.ReadingList", b =>
+                {
+                    b.Navigation("Items");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserNovelDataService.Models.Database.Volume", b =>
+                {
+                    b.Navigation("Chapters");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

FictionArchive.Service.UserNovelDataService/Models/DTOs/AddToReadingListInput.cs

@@ -0,0 +1,3 @@
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public record AddToReadingListInput(int ReadingListId, uint NovelId);

FictionArchive.Service.UserNovelDataService/Models/DTOs/BookmarkDto.cs

@@ -0,0 +1,12 @@
+using NodaTime;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public class BookmarkDto
+{
+    public int Id { get; init; }
+    public uint ChapterId { get; init; }
+    public uint NovelId { get; init; }
+    public string? Description { get; init; }
+    public Instant CreatedTime { get; init; }
+}

FictionArchive.Service.UserNovelDataService/Models/DTOs/BookmarkPayload.cs

@@ -0,0 +1,7 @@
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public class BookmarkPayload
+{
+    public BookmarkDto? Bookmark { get; init; }
+    public bool Success { get; init; }
+}

FictionArchive.Service.UserNovelDataService/Models/DTOs/CreateReadingListInput.cs

@@ -0,0 +1,3 @@
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public record CreateReadingListInput(string Name, string? Description);

FictionArchive.Service.UserNovelDataService/Models/DTOs/DeleteReadingListPayload.cs

@@ -0,0 +1,6 @@
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public class DeleteReadingListPayload
+{
+    public bool Success { get; init; }
+}

FictionArchive.Service.UserNovelDataService/Models/DTOs/ReadingListDto.cs

@@ -0,0 +1,13 @@
+using NodaTime;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public class ReadingListDto
+{
+    public int Id { get; init; }
+    public required string Name { get; init; }
+    public string? Description { get; init; }
+    public IEnumerable<ReadingListItemDto> Items { get; init; } = [];
+    public int ItemCount { get; init; }
+    public Instant CreatedTime { get; init; }
+}

FictionArchive.Service.UserNovelDataService/Models/DTOs/ReadingListItemDto.cs

@@ -0,0 +1,10 @@
+using NodaTime;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public class ReadingListItemDto
+{
+    public uint NovelId { get; init; }
+    public int Order { get; init; }
+    public Instant AddedTime { get; init; }
+}

FictionArchive.Service.UserNovelDataService/Models/DTOs/ReadingListPayload.cs

@@ -0,0 +1,7 @@
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public class ReadingListPayload
+{
+    public ReadingListDto? ReadingList { get; init; }
+    public bool Success { get; init; }
+}

FictionArchive.Service.UserNovelDataService/Models/DTOs/ReorderReadingListItemInput.cs

@@ -0,0 +1,3 @@
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public record ReorderReadingListItemInput(int ReadingListId, uint NovelId, int NewOrder);

FictionArchive.Service.UserNovelDataService/Models/DTOs/UpdateReadingListInput.cs

@@ -0,0 +1,3 @@
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public record UpdateReadingListInput(int Id, string Name, string? Description);

FictionArchive.Service.UserNovelDataService/Models/DTOs/UpsertBookmarkInput.cs

@@ -0,0 +1,3 @@
+namespace FictionArchive.Service.UserNovelDataService.Models.DTOs;
+
+public record UpsertBookmarkInput(uint NovelId, uint ChapterId, string? Description);

FictionArchive.Service.UserNovelDataService/Models/Database/Bookmark.cs

@@ -0,0 +1,14 @@
+using FictionArchive.Service.Shared.Models;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.Database;
+
+public class Bookmark : BaseEntity<int>
+{
+    public Guid UserId { get; set; }
+    public virtual User User { get; set; } = null!;
+
+    public uint ChapterId { get; set; }
+    public uint NovelId { get; set; }
+
+    public string? Description { get; set; }
+}

FictionArchive.Service.UserNovelDataService/Models/Database/Chapter.cs

@@ -0,0 +1,9 @@
+using FictionArchive.Service.Shared.Models;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.Database;
+
+public class Chapter : BaseEntity<uint>
+{
+    public uint VolumeId { get; set; }
+    public virtual Volume Volume { get; set; } = null!;
+}

FictionArchive.Service.UserNovelDataService/Models/Database/Novel.cs

@@ -0,0 +1,8 @@
+using FictionArchive.Service.Shared.Models;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.Database;
+
+public class Novel : BaseEntity<uint>
+{
+    public virtual ICollection<Volume> Volumes { get; set; } = new List<Volume>();
+}

FictionArchive.Service.UserNovelDataService/Models/Database/ReadingList.cs

@@ -0,0 +1,14 @@
+using FictionArchive.Service.Shared.Models;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.Database;
+
+public class ReadingList : BaseEntity<int>
+{
+    public Guid UserId { get; set; }
+    public virtual User User { get; set; } = null!;
+
+    public required string Name { get; set; }
+    public string? Description { get; set; }
+
+    public virtual ICollection<ReadingListItem> Items { get; set; } = new List<ReadingListItem>();
+}

FictionArchive.Service.UserNovelDataService/Models/Database/ReadingListItem.cs

@@ -0,0 +1,12 @@
+using FictionArchive.Service.Shared.Models;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.Database;
+
+public class ReadingListItem : BaseEntity<int>
+{
+    public int ReadingListId { get; set; }
+    public virtual ReadingList ReadingList { get; set; } = null!;
+
+    public uint NovelId { get; set; }
+    public int Order { get; set; }
+}

FictionArchive.Service.UserNovelDataService/Models/Database/User.cs

@@ -0,0 +1,8 @@
+using FictionArchive.Service.Shared.Models;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.Database;
+
+public class User : BaseEntity<Guid>
+{
+    public required string OAuthProviderId { get; set; }
+}

FictionArchive.Service.UserNovelDataService/Models/Database/Volume.cs

@@ -0,0 +1,10 @@
+using FictionArchive.Service.Shared.Models;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.Database;
+
+public class Volume : BaseEntity<uint>
+{
+    public uint NovelId { get; set; }
+    public virtual Novel Novel { get; set; } = null!;
+    public virtual ICollection<Chapter> Chapters { get; set; } = new List<Chapter>();
+}

FictionArchive.Service.UserNovelDataService/Models/IntegrationEvents/ChapterCreatedEvent.cs

@@ -0,0 +1,13 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+
+public class ChapterCreatedEvent : IIntegrationEvent
+{
+    public required uint ChapterId { get; init; }
+    public required uint NovelId { get; init; }
+    public required uint VolumeId { get; init; }
+    public required int VolumeOrder { get; init; }
+    public required uint ChapterOrder { get; init; }
+    public required string ChapterTitle { get; init; }
+}

FictionArchive.Service.UserNovelDataService/Models/IntegrationEvents/NovelCreatedEvent.cs

@@ -0,0 +1,13 @@
+using FictionArchive.Common.Enums;
+using FictionArchive.Service.Shared.Services.EventBus;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+
+public class NovelCreatedEvent : IIntegrationEvent
+{
+    public required uint NovelId { get; init; }
+    public required string Title { get; init; }
+    public required Language OriginalLanguage { get; init; }
+    public required string Source { get; init; }
+    public required string AuthorName { get; init; }
+}

FictionArchive.Service.UserNovelDataService/Models/IntegrationEvents/UserInvitedEvent.cs

@@ -0,0 +1,15 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+
+namespace FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+
+public class UserInvitedEvent : IIntegrationEvent
+{
+    public Guid InvitedUserId { get; set; }
+    public required string InvitedUsername { get; set; }
+    public required string InvitedEmail { get; set; }
+    public required string InvitedOAuthProviderId { get; set; }
+
+    public Guid InviterId { get; set; }
+    public required string InviterUsername { get; set; }
+    public required string InviterOAuthProviderId { get; set; }
+}

FictionArchive.Service.UserNovelDataService/Program.cs

@@ -0,0 +1,80 @@
+using FictionArchive.Common.Extensions;
+using FictionArchive.Service.Shared;
+using FictionArchive.Service.Shared.Extensions;
+using FictionArchive.Service.Shared.Services.EventBus.Implementations;
+using FictionArchive.Service.UserNovelDataService.GraphQL;
+using FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+using FictionArchive.Service.UserNovelDataService.Services;
+using FictionArchive.Service.UserNovelDataService.Services.EventHandlers;
+
+namespace FictionArchive.Service.UserNovelDataService;
+
+public class Program
+{
+    public static void Main(string[] args)
+    {
+        var builder = WebApplication.CreateBuilder(args);
+        
+        var isSchemaExport = SchemaExportDetector.IsSchemaExportMode(args);
+
+        builder.AddLocalAppsettings();
+        
+        builder.Services.AddMemoryCache();
+        builder.Services.AddHealthChecks();
+        
+        #region Event Bus
+
+        if (!isSchemaExport)
+        {
+            builder.Services.AddRabbitMQ(opt =>
+            {
+                builder.Configuration.GetSection("RabbitMQ").Bind(opt);
+            })
+                .Subscribe<NovelCreatedEvent, NovelCreatedEventHandler>()
+                .Subscribe<ChapterCreatedEvent, ChapterCreatedEventHandler>()
+                .Subscribe<UserInvitedEvent, UserInvitedEventHandler>();
+        }
+
+        #endregion
+        
+        #region GraphQL
+
+        builder.Services.AddDefaultGraphQl<Query, Mutation>()
+            .AddAuthorization();
+        
+        #endregion
+        
+        #region Database
+
+        builder.Services.RegisterDbContext<UserNovelDataServiceDbContext>(
+            builder.Configuration.GetConnectionString("DefaultConnection"),
+            skipInfrastructure: isSchemaExport);
+        
+        #endregion
+        
+        // Authentication & Authorization
+        builder.Services.AddOidcAuthentication(builder.Configuration);
+        builder.Services.AddFictionArchiveAuthorization();
+        
+        var app = builder.Build();
+        
+        // Update database (skip in schema export mode)
+        if (!isSchemaExport)
+        {
+            using var scope = app.Services.CreateScope();
+            var dbContext = scope.ServiceProvider.GetRequiredService<UserNovelDataServiceDbContext>();
+            dbContext.UpdateDatabase();
+        }
+        
+        app.UseHttpsRedirection();
+
+        app.MapHealthChecks("/healthz");
+
+        app.UseAuthentication();
+        app.UseAuthorization();
+
+        app.MapGraphQL();
+
+        app.RunWithGraphQLCommands(args);
+    }
+}

FictionArchive.Service.UserNovelDataService/Properties/launchSettings.json

@@ -0,0 +1,38 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:26318",
+      "sslPort": 44303
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5130",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7298;http://localhost:5130",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

FictionArchive.Service.UserNovelDataService/Scripts/00_README.md

@@ -0,0 +1,93 @@
+# UserNovelDataService Backfill Scripts
+
+SQL scripts for backfilling data from UserService and NovelService into UserNovelDataService.
+
+## Prerequisites
+
+1. **Run EF migrations** on the UserNovelDataService database to ensure all tables exist:
+   ```bash
+   dotnet ef database update --project FictionArchive.Service.UserNovelDataService
+   ```
+
+   This will apply the `AddNovelVolumeChapter` migration which creates:
+   - `Novels` table (Id, CreatedTime, LastUpdatedTime)
+   - `Volumes` table (Id, NovelId FK, CreatedTime, LastUpdatedTime)
+   - `Chapters` table (Id, VolumeId FK, CreatedTime, LastUpdatedTime)
+
+## Execution Order
+
+Run scripts in numeric order:
+
+### Extraction (run against source databases)
+1. `01_extract_users_from_userservice.sql` - Run against **UserService** DB
+2. `02_extract_novels_from_novelservice.sql` - Run against **NovelService** DB
+3. `03_extract_volumes_from_novelservice.sql` - Run against **NovelService** DB
+4. `04_extract_chapters_from_novelservice.sql` - Run against **NovelService** DB
+
+### Insertion (run against UserNovelDataService database)
+5. `05_insert_users_to_usernoveldataservice.sql`
+6. `06_insert_novels_to_usernoveldataservice.sql`
+7. `07_insert_volumes_to_usernoveldataservice.sql`
+8. `08_insert_chapters_to_usernoveldataservice.sql`
+
+## Methods
+
+Each script provides three options:
+
+1. **SELECT for review** - Review data before export
+2. **Generate INSERT statements** - Creates individual INSERT statements (good for small datasets)
+3. **CSV export/import** - Use PostgreSQL `\copy` for bulk operations (recommended for large datasets)
+
+## Example Workflow
+
+### Using CSV Export/Import (Recommended)
+
+```bash
+# 1. Export from source databases
+psql -h localhost -U postgres -d userservice -c "\copy (SELECT \"Id\", \"OAuthProviderId\", \"CreatedTime\", \"LastUpdatedTime\" FROM \"Users\" WHERE \"Disabled\" = false) TO '/tmp/users_export.csv' WITH CSV HEADER"
+
+psql -h localhost -U postgres -d novelservice -c "\copy (SELECT \"Id\", \"CreatedTime\", \"LastUpdatedTime\" FROM \"Novels\") TO '/tmp/novels_export.csv' WITH CSV HEADER"
+
+psql -h localhost -U postgres -d novelservice -c "\copy (SELECT \"Id\", \"NovelId\", \"CreatedTime\", \"LastUpdatedTime\" FROM \"Volume\" ORDER BY \"NovelId\", \"Id\") TO '/tmp/volumes_export.csv' WITH CSV HEADER"
+
+psql -h localhost -U postgres -d novelservice -c "\copy (SELECT \"Id\", \"VolumeId\", \"CreatedTime\", \"LastUpdatedTime\" FROM \"Chapter\" ORDER BY \"VolumeId\", \"Id\") TO '/tmp/chapters_export.csv' WITH CSV HEADER"
+
+# 2. Import into UserNovelDataService (order matters due to FK constraints!)
+psql -h localhost -U postgres -d usernoveldataservice -c "\copy \"Users\" (\"Id\", \"OAuthProviderId\", \"CreatedTime\", \"LastUpdatedTime\") FROM '/tmp/users_export.csv' WITH CSV HEADER"
+
+psql -h localhost -U postgres -d usernoveldataservice -c "\copy \"Novels\" (\"Id\", \"CreatedTime\", \"LastUpdatedTime\") FROM '/tmp/novels_export.csv' WITH CSV HEADER"
+
+psql -h localhost -U postgres -d usernoveldataservice -c "\copy \"Volumes\" (\"Id\", \"NovelId\", \"CreatedTime\", \"LastUpdatedTime\") FROM '/tmp/volumes_export.csv' WITH CSV HEADER"
+
+psql -h localhost -U postgres -d usernoveldataservice -c "\copy \"Chapters\" (\"Id\", \"VolumeId\", \"CreatedTime\", \"LastUpdatedTime\") FROM '/tmp/chapters_export.csv' WITH CSV HEADER"
+```
+
+**Important**: Insert order matters due to foreign key constraints:
+1. Users (no dependencies)
+2. Novels (no dependencies)
+3. Volumes (depends on Novels)
+4. Chapters (depends on Volumes)
+
+### Using dblink (Cross-database queries)
+
+If both databases are on the same PostgreSQL server, you can use `dblink` extension for direct cross-database inserts. See the commented examples in each insert script.
+
+## Verification
+
+After running the backfill, verify counts match:
+
+```sql
+-- Run on UserService DB
+SELECT COUNT(*) as user_count FROM "Users" WHERE "Disabled" = false;
+
+-- Run on NovelService DB
+SELECT COUNT(*) as novel_count FROM "Novels";
+SELECT COUNT(*) as volume_count FROM "Volume";
+SELECT COUNT(*) as chapter_count FROM "Chapter";
+
+-- Run on UserNovelDataService DB
+SELECT COUNT(*) as user_count FROM "Users";
+SELECT COUNT(*) as novel_count FROM "Novels";
+SELECT COUNT(*) as volume_count FROM "Volumes";
+SELECT COUNT(*) as chapter_count FROM "Chapters";
+```

FictionArchive.Service.UserNovelDataService/Scripts/01_extract_users_from_userservice.sql

@@ -0,0 +1,28 @@
+-- Extract Users from UserService database
+-- Run this against: UserService PostgreSQL database
+-- Output: CSV or use COPY TO for bulk export
+
+-- Option 1: Simple SELECT for review/testing
+SELECT
+    "Id",
+    "OAuthProviderId",
+    "CreatedTime",
+    "LastUpdatedTime"
+FROM "Users"
+WHERE "Disabled" = false
+ORDER BY "CreatedTime";
+
+-- Option 2: Generate INSERT statements (useful for small datasets)
+SELECT format(
+    'INSERT INTO "Users" ("Id", "OAuthProviderId", "CreatedTime", "LastUpdatedTime") VALUES (%L, %L, %L, %L) ON CONFLICT ("Id") DO NOTHING;',
+    "Id",
+    "OAuthProviderId",
+    "CreatedTime",
+    "LastUpdatedTime"
+)
+FROM "Users"
+WHERE "Disabled" = false
+ORDER BY "CreatedTime";
+
+-- Option 3: Export to CSV (run from psql)
+-- \copy (SELECT "Id", "OAuthProviderId", "CreatedTime", "LastUpdatedTime" FROM "Users" WHERE "Disabled" = false ORDER BY "CreatedTime") TO '/tmp/users_export.csv' WITH CSV HEADER;

FictionArchive.Service.UserNovelDataService/Scripts/02_extract_novels_from_novelservice.sql

@@ -0,0 +1,24 @@
+-- Extract Novels from NovelService database
+-- Run this against: NovelService PostgreSQL database
+-- Output: CSV or use COPY TO for bulk export
+
+-- Option 1: Simple SELECT for review/testing
+SELECT
+    "Id",
+    "CreatedTime",
+    "LastUpdatedTime"
+FROM "Novels"
+ORDER BY "Id";
+
+-- Option 2: Generate INSERT statements
+SELECT format(
+    'INSERT INTO "Novels" ("Id", "CreatedTime", "LastUpdatedTime") VALUES (%s, %L, %L) ON CONFLICT ("Id") DO NOTHING;',
+    "Id",
+    "CreatedTime",
+    "LastUpdatedTime"
+)
+FROM "Novels"
+ORDER BY "Id";
+
+-- Option 3: Export to CSV (run from psql)
+-- \copy (SELECT "Id", "CreatedTime", "LastUpdatedTime" FROM "Novels" ORDER BY "Id") TO '/tmp/novels_export.csv' WITH CSV HEADER;

FictionArchive.Service.UserNovelDataService/Scripts/03_extract_volumes_from_novelservice.sql

@@ -0,0 +1,26 @@
+-- Extract Volumes from NovelService database
+-- Run this against: NovelService PostgreSQL database
+-- Output: CSV or use COPY TO for bulk export
+
+-- Option 1: Simple SELECT for review/testing
+SELECT
+    "Id",
+    "NovelId",
+    "CreatedTime",
+    "LastUpdatedTime"
+FROM "Volume"
+ORDER BY "NovelId", "Id";
+
+-- Option 2: Generate INSERT statements
+SELECT format(
+    'INSERT INTO "Volumes" ("Id", "NovelId", "CreatedTime", "LastUpdatedTime") VALUES (%s, %s, %L, %L) ON CONFLICT ("Id") DO NOTHING;',
+    "Id",
+    "NovelId",
+    "CreatedTime",
+    "LastUpdatedTime"
+)
+FROM "Volume"
+ORDER BY "NovelId", "Id";
+
+-- Option 3: Export to CSV (run from psql)
+-- \copy (SELECT "Id", "NovelId", "CreatedTime", "LastUpdatedTime" FROM "Volume" ORDER BY "NovelId", "Id") TO '/tmp/volumes_export.csv' WITH CSV HEADER;

FictionArchive.Service.UserNovelDataService/Scripts/04_extract_chapters_from_novelservice.sql

@@ -0,0 +1,26 @@
+-- Extract Chapters from NovelService database
+-- Run this against: NovelService PostgreSQL database
+-- Output: CSV or use COPY TO for bulk export
+
+-- Option 1: Simple SELECT for review/testing
+SELECT
+    "Id",
+    "VolumeId",
+    "CreatedTime",
+    "LastUpdatedTime"
+FROM "Chapter"
+ORDER BY "VolumeId", "Id";
+
+-- Option 2: Generate INSERT statements
+SELECT format(
+    'INSERT INTO "Chapters" ("Id", "VolumeId", "CreatedTime", "LastUpdatedTime") VALUES (%s, %s, %L, %L) ON CONFLICT ("Id") DO NOTHING;',
+    "Id",
+    "VolumeId",
+    "CreatedTime",
+    "LastUpdatedTime"
+)
+FROM "Chapter"
+ORDER BY "VolumeId", "Id";
+
+-- Option 3: Export to CSV (run from psql)
+-- \copy (SELECT "Id", "VolumeId", "CreatedTime", "LastUpdatedTime" FROM "Chapter" ORDER BY "VolumeId", "Id") TO '/tmp/chapters_export.csv' WITH CSV HEADER;

FictionArchive.Service.UserNovelDataService/Scripts/05_insert_users_to_usernoveldataservice.sql

@@ -0,0 +1,32 @@
+-- Insert Users into UserNovelDataService database
+-- Run this against: UserNovelDataService PostgreSQL database
+--
+-- PREREQUISITE: You must have extracted users from UserService first
+-- using 01_extract_users_from_userservice.sql
+
+-- Option 1: If you have a CSV file from export
+-- \copy "Users" ("Id", "OAuthProviderId", "CreatedTime", "LastUpdatedTime") FROM '/tmp/users_export.csv' WITH CSV HEADER;
+
+-- Option 2: Direct cross-database insert using dblink
+-- First, install dblink extension if not already done:
+-- CREATE EXTENSION IF NOT EXISTS dblink;
+
+-- Example using dblink (adjust connection string):
+/*
+INSERT INTO "Users" ("Id", "OAuthProviderId", "CreatedTime", "LastUpdatedTime")
+SELECT
+    "Id"::uuid,
+    "OAuthProviderId",
+    "CreatedTime"::timestamp with time zone,
+    "LastUpdatedTime"::timestamp with time zone
+FROM dblink(
+    'host=localhost port=5432 dbname=userservice user=postgres password=yourpassword',
+    'SELECT "Id", "OAuthProviderId", "CreatedTime", "LastUpdatedTime" FROM "Users" WHERE "Disabled" = false'
+) AS t("Id" uuid, "OAuthProviderId" text, "CreatedTime" timestamp with time zone, "LastUpdatedTime" timestamp with time zone)
+ON CONFLICT ("Id") DO UPDATE SET
+    "OAuthProviderId" = EXCLUDED."OAuthProviderId",
+    "LastUpdatedTime" = EXCLUDED."LastUpdatedTime";
+*/
+
+-- Option 3: Paste generated INSERT statements from extraction script here
+-- INSERT INTO "Users" ("Id", "OAuthProviderId", "CreatedTime", "LastUpdatedTime") VALUES (...) ON CONFLICT ("Id") DO NOTHING;

FictionArchive.Service.UserNovelDataService/Scripts/06_insert_novels_to_usernoveldataservice.sql

@@ -0,0 +1,31 @@
+-- Insert Novels into UserNovelDataService database
+-- Run this against: UserNovelDataService PostgreSQL database
+--
+-- PREREQUISITE:
+-- 1. Ensure the Novels table exists (run EF migrations first if needed)
+-- 2. Extract novels from NovelService using 02_extract_novels_from_novelservice.sql
+
+-- Option 1: If you have a CSV file from export
+-- \copy "Novels" ("Id", "CreatedTime", "LastUpdatedTime") FROM '/tmp/novels_export.csv' WITH CSV HEADER;
+
+-- Option 2: Direct cross-database insert using dblink
+-- First, install dblink extension if not already done:
+-- CREATE EXTENSION IF NOT EXISTS dblink;
+
+-- Example using dblink (adjust connection string):
+/*
+INSERT INTO "Novels" ("Id", "CreatedTime", "LastUpdatedTime")
+SELECT
+    "Id"::bigint,
+    "CreatedTime"::timestamp with time zone,
+    "LastUpdatedTime"::timestamp with time zone
+FROM dblink(
+    'host=localhost port=5432 dbname=novelservice user=postgres password=yourpassword',
+    'SELECT "Id", "CreatedTime", "LastUpdatedTime" FROM "Novels"'
+) AS t("Id" bigint, "CreatedTime" timestamp with time zone, "LastUpdatedTime" timestamp with time zone)
+ON CONFLICT ("Id") DO UPDATE SET
+    "LastUpdatedTime" = EXCLUDED."LastUpdatedTime";
+*/
+
+-- Option 3: Paste generated INSERT statements from extraction script here
+-- INSERT INTO "Novels" ("Id", "CreatedTime", "LastUpdatedTime") VALUES (...) ON CONFLICT ("Id") DO NOTHING;

FictionArchive.Service.UserNovelDataService/Scripts/07_insert_volumes_to_usernoveldataservice.sql

@@ -0,0 +1,34 @@
+-- Insert Volumes into UserNovelDataService database
+-- Run this against: UserNovelDataService PostgreSQL database
+--
+-- PREREQUISITE:
+-- 1. Ensure the Volumes table exists (run EF migrations first if needed)
+-- 2. Novels must be inserted first (FK constraint)
+-- 3. Extract volumes from NovelService using 03_extract_volumes_from_novelservice.sql
+
+-- Option 1: If you have a CSV file from export
+-- \copy "Volumes" ("Id", "NovelId", "CreatedTime", "LastUpdatedTime") FROM '/tmp/volumes_export.csv' WITH CSV HEADER;
+
+-- Option 2: Direct cross-database insert using dblink
+-- First, install dblink extension if not already done:
+-- CREATE EXTENSION IF NOT EXISTS dblink;
+
+-- Example using dblink (adjust connection string):
+/*
+INSERT INTO "Volumes" ("Id", "NovelId", "CreatedTime", "LastUpdatedTime")
+SELECT
+    "Id"::bigint,
+    "NovelId"::bigint,
+    "CreatedTime"::timestamp with time zone,
+    "LastUpdatedTime"::timestamp with time zone
+FROM dblink(
+    'host=localhost port=5432 dbname=novelservice user=postgres password=yourpassword',
+    'SELECT "Id", "NovelId", "CreatedTime", "LastUpdatedTime" FROM "Volume"'
+) AS t("Id" bigint, "NovelId" bigint, "CreatedTime" timestamp with time zone, "LastUpdatedTime" timestamp with time zone)
+ON CONFLICT ("Id") DO UPDATE SET
+    "NovelId" = EXCLUDED."NovelId",
+    "LastUpdatedTime" = EXCLUDED."LastUpdatedTime";
+*/
+
+-- Option 3: Paste generated INSERT statements from extraction script here
+-- INSERT INTO "Volumes" ("Id", "NovelId", "CreatedTime", "LastUpdatedTime") VALUES (...) ON CONFLICT ("Id") DO NOTHING;

FictionArchive.Service.UserNovelDataService/Scripts/08_insert_chapters_to_usernoveldataservice.sql

@@ -0,0 +1,34 @@
+-- Insert Chapters into UserNovelDataService database
+-- Run this against: UserNovelDataService PostgreSQL database
+--
+-- PREREQUISITE:
+-- 1. Ensure the Chapters table exists (run EF migrations first if needed)
+-- 2. Volumes must be inserted first (FK constraint)
+-- 3. Extract chapters from NovelService using 04_extract_chapters_from_novelservice.sql
+
+-- Option 1: If you have a CSV file from export
+-- \copy "Chapters" ("Id", "VolumeId", "CreatedTime", "LastUpdatedTime") FROM '/tmp/chapters_export.csv' WITH CSV HEADER;
+
+-- Option 2: Direct cross-database insert using dblink
+-- First, install dblink extension if not already done:
+-- CREATE EXTENSION IF NOT EXISTS dblink;
+
+-- Example using dblink (adjust connection string):
+/*
+INSERT INTO "Chapters" ("Id", "VolumeId", "CreatedTime", "LastUpdatedTime")
+SELECT
+    "Id"::bigint,
+    "VolumeId"::bigint,
+    "CreatedTime"::timestamp with time zone,
+    "LastUpdatedTime"::timestamp with time zone
+FROM dblink(
+    'host=localhost port=5432 dbname=novelservice user=postgres password=yourpassword',
+    'SELECT "Id", "VolumeId", "CreatedTime", "LastUpdatedTime" FROM "Chapter"'
+) AS t("Id" bigint, "VolumeId" bigint, "CreatedTime" timestamp with time zone, "LastUpdatedTime" timestamp with time zone)
+ON CONFLICT ("Id") DO UPDATE SET
+    "VolumeId" = EXCLUDED."VolumeId",
+    "LastUpdatedTime" = EXCLUDED."LastUpdatedTime";
+*/
+
+-- Option 3: Paste generated INSERT statements from extraction script here
+-- INSERT INTO "Chapters" ("Id", "VolumeId", "CreatedTime", "LastUpdatedTime") VALUES (...) ON CONFLICT ("Id") DO NOTHING;

FictionArchive.Service.UserNovelDataService/Services/EventHandlers/ChapterCreatedEventHandler.cs

@@ -0,0 +1,53 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+using FictionArchive.Service.UserNovelDataService.Models.Database;
+using FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+using Microsoft.EntityFrameworkCore;
+
+namespace FictionArchive.Service.UserNovelDataService.Services.EventHandlers;
+
+public class ChapterCreatedEventHandler : IIntegrationEventHandler<ChapterCreatedEvent>
+{
+    private readonly UserNovelDataServiceDbContext _dbContext;
+    private readonly ILogger<ChapterCreatedEventHandler> _logger;
+
+    public ChapterCreatedEventHandler(
+        UserNovelDataServiceDbContext dbContext,
+        ILogger<ChapterCreatedEventHandler> logger)
+    {
+        _dbContext = dbContext;
+        _logger = logger;
+    }
+
+    public async Task Handle(ChapterCreatedEvent @event)
+    {
+        // Ensure novel exists
+        var novelExists = await _dbContext.Novels.AnyAsync(n => n.Id == @event.NovelId);
+        if (!novelExists)
+        {
+            var novel = new Novel { Id = @event.NovelId };
+            _dbContext.Novels.Add(novel);
+        }
+
+        // Ensure volume exists
+        var volumeExists = await _dbContext.Volumes.AnyAsync(v => v.Id == @event.VolumeId);
+        if (!volumeExists)
+        {
+            var volume = new Volume { Id = @event.VolumeId };
+            _dbContext.Volumes.Add(volume);
+        }
+
+        // Create chapter if not exists
+        var chapterExists = await _dbContext.Chapters.AnyAsync(c => c.Id == @event.ChapterId);
+        if (chapterExists)
+        {
+            _logger.LogDebug("Chapter {ChapterId} already exists, skipping", @event.ChapterId);
+            return;
+        }
+
+        var chapter = new Chapter { Id = @event.ChapterId };
+        _dbContext.Chapters.Add(chapter);
+        await _dbContext.SaveChangesAsync();
+
+        _logger.LogInformation("Created chapter stub for {ChapterId} in novel {NovelId}", @event.ChapterId, @event.NovelId);
+    }
+}

FictionArchive.Service.UserNovelDataService/Services/EventHandlers/NovelCreatedEventHandler.cs

@@ -0,0 +1,36 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+using FictionArchive.Service.UserNovelDataService.Models.Database;
+using FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+using Microsoft.EntityFrameworkCore;
+
+namespace FictionArchive.Service.UserNovelDataService.Services.EventHandlers;
+
+public class NovelCreatedEventHandler : IIntegrationEventHandler<NovelCreatedEvent>
+{
+    private readonly UserNovelDataServiceDbContext _dbContext;
+    private readonly ILogger<NovelCreatedEventHandler> _logger;
+
+    public NovelCreatedEventHandler(
+        UserNovelDataServiceDbContext dbContext,
+        ILogger<NovelCreatedEventHandler> logger)
+    {
+        _dbContext = dbContext;
+        _logger = logger;
+    }
+
+    public async Task Handle(NovelCreatedEvent @event)
+    {
+        var exists = await _dbContext.Novels.AnyAsync(n => n.Id == @event.NovelId);
+        if (exists)
+        {
+            _logger.LogDebug("Novel {NovelId} already exists, skipping", @event.NovelId);
+            return;
+        }
+
+        var novel = new Novel { Id = @event.NovelId };
+        _dbContext.Novels.Add(novel);
+        await _dbContext.SaveChangesAsync();
+
+        _logger.LogInformation("Created novel stub for {NovelId}", @event.NovelId);
+    }
+}

FictionArchive.Service.UserNovelDataService/Services/EventHandlers/UserInvitedEventHandler.cs

@@ -0,0 +1,40 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+using FictionArchive.Service.UserNovelDataService.Models.Database;
+using FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+using Microsoft.EntityFrameworkCore;
+
+namespace FictionArchive.Service.UserNovelDataService.Services.EventHandlers;
+
+public class UserInvitedEventHandler : IIntegrationEventHandler<UserInvitedEvent>
+{
+    private readonly UserNovelDataServiceDbContext _dbContext;
+    private readonly ILogger<UserInvitedEventHandler> _logger;
+
+    public UserInvitedEventHandler(
+        UserNovelDataServiceDbContext dbContext,
+        ILogger<UserInvitedEventHandler> logger)
+    {
+        _dbContext = dbContext;
+        _logger = logger;
+    }
+
+    public async Task Handle(UserInvitedEvent @event)
+    {
+        var exists = await _dbContext.Users.AnyAsync(u => u.Id == @event.InvitedUserId);
+        if (exists)
+        {
+            _logger.LogDebug("User {UserId} already exists, skipping", @event.InvitedUserId);
+            return;
+        }
+
+        var user = new User
+        {
+            Id = @event.InvitedUserId,
+            OAuthProviderId = @event.InvitedOAuthProviderId
+        };
+        _dbContext.Users.Add(user);
+        await _dbContext.SaveChangesAsync();
+
+        _logger.LogInformation("Created user stub for {UserId}", @event.InvitedUserId);
+    }
+}

FictionArchive.Service.UserNovelDataService/Services/UserNovelDataServiceDbContext.cs

@@ -0,0 +1,67 @@
+using FictionArchive.Service.Shared.Services.Database;
+using FictionArchive.Service.UserNovelDataService.Models.Database;
+using Microsoft.EntityFrameworkCore;
+
+namespace FictionArchive.Service.UserNovelDataService.Services;
+
+public class UserNovelDataServiceDbContext : FictionArchiveDbContext
+{
+    public DbSet<User> Users { get; set; }
+    public DbSet<Bookmark> Bookmarks { get; set; }
+    public DbSet<Novel> Novels { get; set; }
+    public DbSet<Volume> Volumes { get; set; }
+    public DbSet<Chapter> Chapters { get; set; }
+    public DbSet<ReadingList> ReadingLists { get; set; }
+    public DbSet<ReadingListItem> ReadingListItems { get; set; }
+
+    public UserNovelDataServiceDbContext(DbContextOptions options, ILogger<UserNovelDataServiceDbContext> logger) : base(options, logger)
+    {
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+
+        modelBuilder.Entity<Bookmark>(entity =>
+        {
+            // Unique constraint: one bookmark per chapter per user
+            entity.HasIndex(b => new { b.UserId, b.ChapterId }).IsUnique();
+
+            // Index for efficient "get bookmarks for novel" queries
+            entity.HasIndex(b => new { b.UserId, b.NovelId });
+
+            // User relationship
+            entity.HasOne(b => b.User)
+                .WithMany()
+                .HasForeignKey(b => b.UserId)
+                .OnDelete(DeleteBehavior.Cascade);
+        });
+
+        modelBuilder.Entity<ReadingList>(entity =>
+        {
+            // Index for fetching user's lists
+            entity.HasIndex(r => r.UserId);
+
+            // User relationship with cascade delete
+            entity.HasOne(r => r.User)
+                .WithMany()
+                .HasForeignKey(r => r.UserId)
+                .OnDelete(DeleteBehavior.Cascade);
+        });
+
+        modelBuilder.Entity<ReadingListItem>(entity =>
+        {
+            // Unique constraint: one entry per novel per list
+            entity.HasIndex(i => new { i.ReadingListId, i.NovelId }).IsUnique();
+
+            // Index for efficient ordered retrieval
+            entity.HasIndex(i => new { i.ReadingListId, i.Order });
+
+            // ReadingList relationship with cascade delete
+            entity.HasOne(i => i.ReadingList)
+                .WithMany(r => r.Items)
+                .HasForeignKey(i => i.ReadingListId)
+                .OnDelete(DeleteBehavior.Cascade);
+        });
+    }
+}

FictionArchive.Service.UserNovelDataService/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

FictionArchive.Service.UserNovelDataService/appsettings.json

@@ -0,0 +1,26 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "ConnectionStrings": {
+    "DefaultConnection": "Host=localhost;Database=FictionArchive_UserNovelDataService;Username=postgres;password=postgres"
+  },
+  "RabbitMQ": {
+    "ConnectionString": "amqp://localhost",
+    "ClientIdentifier": "UserNovelDataService"
+  },
+  "OIDC": {
+    "Authority": "https://auth.orfl.xyz/application/o/fiction-archive/",
+    "ClientId": "ldi5IpEidq2WW0Ka1lehVskb2SOBjnYRaZCpEyBh",
+    "Audience": "ldi5IpEidq2WW0Ka1lehVskb2SOBjnYRaZCpEyBh",
+    "ValidIssuer": "https://auth.orfl.xyz/application/o/fiction-archive/",
+    "ValidateIssuer": true,
+    "ValidateAudience": true,
+    "ValidateLifetime": true,
+    "ValidateIssuerSigningKey": true
+  },
+  "AllowedHosts": "*"
+}

FictionArchive.Service.UserNovelDataService/subgraph-config.json

@@ -0,0 +1,6 @@
+{
+  "subgraph": "UserNovelData",
+  "http": {
+    "baseAddress": "https://localhost:7298/graphql"
+  }
+}

FictionArchive.Service.UserService.Tests/FictionArchive.Service.UserService.Tests.csproj

@@ -0,0 +1,30 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="9.0.11" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\FictionArchive.Service.UserService\FictionArchive.Service.UserService.csproj" />
+  </ItemGroup>
+
+</Project>

FictionArchive.Service.UserService.Tests/UserManagementServiceTests.cs

@@ -0,0 +1,329 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+using FictionArchive.Service.UserService.Models.Database;
+using FictionArchive.Service.UserService.Services;
+using FictionArchive.Service.UserService.Services.AuthenticationClient;
+using FictionArchive.Service.UserService.Services.AuthenticationClient.Authentik;
+using FluentAssertions;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging.Abstractions;
+using NSubstitute;
+using Xunit;
+
+namespace FictionArchive.Service.UserService.Tests;
+
+public class UserManagementServiceTests
+{
+    #region Helper Methods
+
+    private static UserServiceDbContext CreateDbContext()
+    {
+        var options = new DbContextOptionsBuilder<UserServiceDbContext>()
+            .UseInMemoryDatabase($"UserManagementServiceTests-{Guid.NewGuid()}")
+            .Options;
+
+        return new UserServiceDbContext(options, NullLogger<UserServiceDbContext>.Instance);
+    }
+
+    private static UserManagementService CreateService(
+        UserServiceDbContext dbContext,
+        IAuthenticationServiceClient authClient,
+        IEventBus? eventBus = null)
+    {
+        return new UserManagementService(
+            dbContext,
+            NullLogger<UserManagementService>.Instance,
+            authClient,
+            eventBus ?? Substitute.For<IEventBus>());
+    }
+
+    private static User CreateTestUser(string username, string email, int availableInvites = 5)
+    {
+        return new User
+        {
+            Username = username,
+            Email = email,
+            OAuthProviderId = Guid.NewGuid().ToString(),
+            Disabled = false,
+            AvailableInvites = availableInvites
+        };
+    }
+
+    #endregion
+
+    #region InviteUserAsync Tests
+
+    [Fact]
+    public async Task InviteUserAsync_WithValidInviter_CreatesUserAndDecrementsInvites()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var inviter = CreateTestUser("inviter", "inviter@test.com", availableInvites: 3);
+        dbContext.Users.Add(inviter);
+        await dbContext.SaveChangesAsync();
+
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        authClient.CreateUserAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>())
+            .Returns(new AuthentikUserResponse { Pk = 123, Uid = "authentik-uid-456" });
+        authClient.SendRecoveryEmailAsync(Arg.Any<int>()).Returns(true);
+
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.InviteUserAsync(inviter, "new@test.com", "newuser");
+
+        // Assert
+        result.Should().NotBeNull();
+        result!.Username.Should().Be("newuser");
+        result.Email.Should().Be("new@test.com");
+        result.InviterId.Should().Be(inviter.Id);
+        result.AvailableInvites.Should().Be(0);
+        inviter.AvailableInvites.Should().Be(2);
+
+        await authClient.Received(1).CreateUserAsync("newuser", "new@test.com", "newuser");
+        await authClient.Received(1).SendRecoveryEmailAsync(123);
+    }
+
+    [Fact]
+    public async Task InviteUserAsync_WithNoAvailableInvites_ReturnsNull()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var inviter = CreateTestUser("inviter", "inviter@test.com", availableInvites: 0);
+        dbContext.Users.Add(inviter);
+        await dbContext.SaveChangesAsync();
+
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.InviteUserAsync(inviter, "new@test.com", "newuser");
+
+        // Assert
+        result.Should().BeNull();
+        await authClient.DidNotReceive().CreateUserAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>());
+    }
+
+    [Fact]
+    public async Task InviteUserAsync_WithDuplicateEmail_ReturnsNull()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var existingUser = CreateTestUser("existing", "existing@test.com");
+        var inviter = CreateTestUser("inviter", "inviter@test.com", availableInvites: 3);
+        dbContext.Users.AddRange(existingUser, inviter);
+        await dbContext.SaveChangesAsync();
+
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.InviteUserAsync(inviter, "existing@test.com", "newuser");
+
+        // Assert
+        result.Should().BeNull();
+        await authClient.DidNotReceive().CreateUserAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>());
+        inviter.AvailableInvites.Should().Be(3); // Not decremented
+    }
+
+    [Fact]
+    public async Task InviteUserAsync_WithDuplicateUsername_ReturnsNull()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var existingUser = CreateTestUser("existinguser", "existing@test.com");
+        var inviter = CreateTestUser("inviter", "inviter@test.com", availableInvites: 3);
+        dbContext.Users.AddRange(existingUser, inviter);
+        await dbContext.SaveChangesAsync();
+
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.InviteUserAsync(inviter, "new@test.com", "existinguser");
+
+        // Assert
+        result.Should().BeNull();
+        await authClient.DidNotReceive().CreateUserAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>());
+        inviter.AvailableInvites.Should().Be(3); // Not decremented
+    }
+
+    [Fact]
+    public async Task InviteUserAsync_WhenAuthentikFails_ReturnsNull()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var inviter = CreateTestUser("inviter", "inviter@test.com", availableInvites: 3);
+        dbContext.Users.Add(inviter);
+        await dbContext.SaveChangesAsync();
+
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        authClient.CreateUserAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>())
+            .Returns((AuthentikUserResponse?)null);
+
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.InviteUserAsync(inviter, "new@test.com", "newuser");
+
+        // Assert
+        result.Should().BeNull();
+        await authClient.DidNotReceive().SendRecoveryEmailAsync(Arg.Any<int>());
+
+        // Verify no user was added to the database
+        var usersInDb = await dbContext.Users.ToListAsync();
+        usersInDb.Should().HaveCount(1); // Only the inviter
+        inviter.AvailableInvites.Should().Be(3); // Not decremented
+    }
+
+    [Fact]
+    public async Task InviteUserAsync_WhenRecoveryEmailFails_StillCreatesUser()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var inviter = CreateTestUser("inviter", "inviter@test.com", availableInvites: 3);
+        dbContext.Users.Add(inviter);
+        await dbContext.SaveChangesAsync();
+
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        authClient.CreateUserAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>())
+            .Returns(new AuthentikUserResponse { Pk = 123, Uid = "authentik-uid-456" });
+        authClient.SendRecoveryEmailAsync(Arg.Any<int>()).Returns(false); // Email fails
+
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.InviteUserAsync(inviter, "new@test.com", "newuser");
+
+        // Assert - User should still be created despite email failure
+        result.Should().NotBeNull();
+        result!.Username.Should().Be("newuser");
+        inviter.AvailableInvites.Should().Be(2);
+
+        // Verify user was added to database
+        var usersInDb = await dbContext.Users.ToListAsync();
+        usersInDb.Should().HaveCount(2);
+    }
+
+    [Fact]
+    public async Task InviteUserAsync_SetsCorrectUserProperties()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var inviter = CreateTestUser("inviter", "inviter@test.com", availableInvites: 5);
+        dbContext.Users.Add(inviter);
+        await dbContext.SaveChangesAsync();
+
+        var authentikPk = 456;
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        authClient.CreateUserAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>())
+            .Returns(new AuthentikUserResponse { Pk = authentikPk, Uid = "authentik-uid-789" });
+        authClient.SendRecoveryEmailAsync(Arg.Any<int>()).Returns(true);
+
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.InviteUserAsync(inviter, "newuser@test.com", "newusername");
+
+        // Assert
+        result.Should().NotBeNull();
+        result!.Username.Should().Be("newusername");
+        result.Email.Should().Be("newuser@test.com");
+        result.OAuthProviderId.Should().Be(authentikPk.ToString());
+        result.InviterId.Should().Be(inviter.Id);
+        result.AvailableInvites.Should().Be(0);
+        result.Disabled.Should().BeFalse();
+        result.Id.Should().NotBeEmpty();
+    }
+
+    #endregion
+
+    #region GetUserByOAuthProviderIdAsync Tests
+
+    [Fact]
+    public async Task GetUserByOAuthProviderIdAsync_WithExistingUser_ReturnsUser()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var oAuthProviderId = "oauth-provider-123";
+        var user = new User
+        {
+            Username = "testuser",
+            Email = "test@test.com",
+            OAuthProviderId = oAuthProviderId,
+            Disabled = false,
+            AvailableInvites = 5
+        };
+        dbContext.Users.Add(user);
+        await dbContext.SaveChangesAsync();
+
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.GetUserByOAuthProviderIdAsync(oAuthProviderId);
+
+        // Assert
+        result.Should().NotBeNull();
+        result!.Id.Should().Be(user.Id);
+        result.Username.Should().Be("testuser");
+        result.OAuthProviderId.Should().Be(oAuthProviderId);
+    }
+
+    [Fact]
+    public async Task GetUserByOAuthProviderIdAsync_WithNonExistingUser_ReturnsNull()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.GetUserByOAuthProviderIdAsync("non-existing-id");
+
+        // Assert
+        result.Should().BeNull();
+    }
+
+    #endregion
+
+    #region GetUsers Tests
+
+    [Fact]
+    public async Task GetUsers_ReturnsAllUsers()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var user1 = CreateTestUser("user1", "user1@test.com");
+        var user2 = CreateTestUser("user2", "user2@test.com");
+        var user3 = CreateTestUser("user3", "user3@test.com");
+        dbContext.Users.AddRange(user1, user2, user3);
+        await dbContext.SaveChangesAsync();
+
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.GetUsers().ToListAsync();
+
+        // Assert
+        result.Should().HaveCount(3);
+        result.Select(u => u.Username).Should().BeEquivalentTo(new[] { "user1", "user2", "user3" });
+    }
+
+    [Fact]
+    public async Task GetUsers_WithEmptyDb_ReturnsEmptyQueryable()
+    {
+        // Arrange
+        using var dbContext = CreateDbContext();
+        var authClient = Substitute.For<IAuthenticationServiceClient>();
+        var service = CreateService(dbContext, authClient);
+
+        // Act
+        var result = await service.GetUsers().ToListAsync();
+
+        // Assert
+        result.Should().BeEmpty();
+    }
+
+    #endregion
+}

FictionArchive.Service.UserService/FictionArchive.Service.UserService.csproj

@@ -22,6 +22,12 @@
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       </PackageReference>
+      <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <Folder Include="Models\IntegrationEvents\" />
+      <Folder Include="Services\EventHandlers\" />
     </ItemGroup>
 
 </Project>

FictionArchive.Service.UserService/GraphQL/Mutation.cs

@@ -1,38 +1,53 @@
-using FictionArchive.Service.Shared.Constants;
+using System.Security.Claims;
 using FictionArchive.Service.UserService.Models.DTOs;
 using FictionArchive.Service.UserService.Services;
 using HotChocolate.Authorization;
+using HotChocolate.Types;
 
 namespace FictionArchive.Service.UserService.GraphQL;
 
 public class Mutation
 {
-    [Authorize(Roles = [AuthorizationConstants.Roles.Admin])]
-    public async Task<UserDto> RegisterUser(string username, string email, string oAuthProviderId,
-        string? inviterOAuthProviderId, UserManagementService userManagementService)
+    [Authorize]
+    [Error<InvalidOperationException>]
+    public async Task<UserDto> InviteUser(
+        string email,
+        string username,
+        UserManagementService userManagementService,
+        ClaimsPrincipal claimsPrincipal)
     {
-        var user = await userManagementService.RegisterUser(username, email, oAuthProviderId, inviterOAuthProviderId);
+        // Get the current user's OAuth provider ID from claims
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
+        {
+            throw new InvalidOperationException("Unable to determine current user identity");
+        }
+
+        // Get the inviter from the database
+        var inviter = await userManagementService.GetUserByOAuthProviderIdAsync(oAuthProviderId);
+        if (inviter == null)
+        {
+            throw new InvalidOperationException("Current user not found in the system");
+        }
+
+        // Invite the new user
+        var newUser = await userManagementService.InviteUserAsync(inviter, email, username);
+        if (newUser == null)
+        {
+            throw new InvalidOperationException(
+                "Failed to invite user. Either you have no available invites, or the email/username is already in use.");
+        }
 
         return new UserDto
         {
-            Id = user.Id,
-            CreatedTime = user.CreatedTime,
-            LastUpdatedTime = user.LastUpdatedTime,
-            Username = user.Username,
-            Email = user.Email,
-            Disabled = user.Disabled,
-            Inviter = user.Inviter != null
-                ? new UserDto
-                {
-                    Id = user.Inviter.Id,
-                    CreatedTime = user.Inviter.CreatedTime,
-                    LastUpdatedTime = user.Inviter.LastUpdatedTime,
-                    Username = user.Inviter.Username,
-                    Email = user.Inviter.Email,
-                    Disabled = user.Inviter.Disabled,
-                    Inviter = null // Limit recursion to one level
-                }
-                : null
+            Id = newUser.Id,
+            CreatedTime = newUser.CreatedTime,
+            LastUpdatedTime = newUser.LastUpdatedTime,
+            Username = newUser.Username,
+            Email = newUser.Email,
+            Disabled = newUser.Disabled,
+            AvailableInvites = newUser.AvailableInvites,
+            InviterId = newUser.InviterId
         };
     }
 }

FictionArchive.Service.UserService/GraphQL/Query.cs

@@ -1,34 +1,43 @@
+using System.Security.Claims;
 using FictionArchive.Service.UserService.Models.DTOs;
 using FictionArchive.Service.UserService.Services;
 using HotChocolate.Authorization;
+using HotChocolate.Data;
 
 namespace FictionArchive.Service.UserService.GraphQL;
 
 public class Query
 {
     [Authorize]
-    public IQueryable<UserDto> GetUsers(UserManagementService userManagementService)
+    [UseProjection]
+    [UseFirstOrDefault]
+    public IQueryable<UserDto> GetCurrentUser(
+        UserServiceDbContext dbContext,
+        ClaimsPrincipal claimsPrincipal)
     {
-        return userManagementService.GetUsers().Select(user => new UserDto
+        var oAuthProviderId = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (string.IsNullOrEmpty(oAuthProviderId))
         {
-            Id = user.Id,
-            CreatedTime = user.CreatedTime,
-            LastUpdatedTime = user.LastUpdatedTime,
-            Username = user.Username,
-            Email = user.Email,
-            Disabled = user.Disabled,
-            Inviter = user.Inviter != null
-                ? new UserDto
+            return Enumerable.Empty<UserDto>().AsQueryable();
+        }
+
+        return dbContext.Users
+            .Where(u => u.OAuthProviderId == oAuthProviderId)
+            .Select(u => new UserDto
+            {
+                Id = u.Id,
+                CreatedTime = u.CreatedTime,
+                LastUpdatedTime = u.LastUpdatedTime,
+                Username = u.Username,
+                Email = u.Email,
+                Disabled = u.Disabled,
+                AvailableInvites = u.AvailableInvites,
+                InviterId = u.InviterId,
+                InvitedUsers = u.InvitedUsers.Select(iu => new InvitedUserDto
                 {
-                    Id = user.Inviter.Id,
-                    CreatedTime = user.Inviter.CreatedTime,
-                    LastUpdatedTime = user.Inviter.LastUpdatedTime,
-                    Username = user.Inviter.Username,
-                    Email = user.Inviter.Email,
-                    Disabled = user.Inviter.Disabled,
-                    Inviter = null // Limit recursion to one level
-                }
-                : null
-        });
+                    Username = iu.Username,
+                    Email = iu.Email
+                }).ToList()
+            });
     }
 }

FictionArchive.Service.UserService/Migrations/20251229151921_AddAvailableInvites.Designer.cs

@@ -0,0 +1,83 @@
+// <auto-generated />
+using System;
+using FictionArchive.Service.UserService.Services;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using NodaTime;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace FictionArchive.Service.UserService.Migrations
+{
+    [DbContext(typeof(UserServiceDbContext))]
+    [Migration("20251229151921_AddAvailableInvites")]
+    partial class AddAvailableInvites
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.11")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("FictionArchive.Service.UserService.Models.Database.User", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<int>("AvailableInvites")
+                        .HasColumnType("integer");
+
+                    b.Property<Instant>("CreatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<bool>("Disabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<Guid?>("InviterId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Instant>("LastUpdatedTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("OAuthProviderId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("InviterId");
+
+                    b.HasIndex("OAuthProviderId")
+                        .IsUnique();
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("FictionArchive.Service.UserService.Models.Database.User", b =>
+                {
+                    b.HasOne("FictionArchive.Service.UserService.Models.Database.User", "Inviter")
+                        .WithMany()
+                        .HasForeignKey("InviterId");
+
+                    b.Navigation("Inviter");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

FictionArchive.Service.UserService/Migrations/20251229151921_AddAvailableInvites.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace FictionArchive.Service.UserService.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddAvailableInvites : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "AvailableInvites",
+                table: "Users",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "AvailableInvites",
+                table: "Users");
+        }
+    }
+}

FictionArchive.Service.UserService/Migrations/UserServiceDbContextModelSnapshot.cs

@@ -29,6 +29,9 @@ namespace FictionArchive.Service.UserService.Migrations
                         .ValueGeneratedOnAdd()
                         .HasColumnType("uuid");
 
+                    b.Property<int>("AvailableInvites")
+                        .HasColumnType("integer");
+
                     b.Property<Instant>("CreatedTime")
                         .HasColumnType("timestamp with time zone");
 

FictionArchive.Service.UserService/Models/DTOs/InvitedUserDto.cs

@@ -0,0 +1,7 @@
+namespace FictionArchive.Service.UserService.Models.DTOs;
+
+public class InvitedUserDto
+{
+    public required string Username { get; init; }
+    public required string Email { get; init; }
+}

FictionArchive.Service.UserService/Models/DTOs/UserDto.cs

@@ -7,9 +7,11 @@ public class UserDto
     public Guid Id { get; init; }
     public Instant CreatedTime { get; init; }
     public Instant LastUpdatedTime { get; init; }
+
     public required string Username { get; init; }
     public required string Email { get; init; }
-    // OAuthProviderId intentionally omitted for security
     public bool Disabled { get; init; }
-    public UserDto? Inviter { get; init; }
+    public int AvailableInvites { get; init; }
+    public Guid? InviterId { get; init; }
+    public List<InvitedUserDto>? InvitedUsers { get; init; }
 }

FictionArchive.Service.UserService/Models/Database/User.cs

@@ -6,15 +6,14 @@ namespace FictionArchive.Service.UserService.Models.Database;
 [Index(nameof(OAuthProviderId), IsUnique = true)]
 public class User : BaseEntity<Guid>
 {
-    public string Username { get; set; }
-    public string Email { get; set; }
-    public string OAuthProviderId { get; set; }
-    
-    
+    public required string Username { get; set; }
+    public required string Email { get; set; }
+    public required string OAuthProviderId { get; set; }
     public bool Disabled { get; set; }
+    public int AvailableInvites { get; set; } = 0;
 
-    /// <summary>
-    /// The user that generated an invite used by this user.
-    /// </summary>
+    // Navigation properties
+    public Guid? InviterId { get; set; }
     public User? Inviter { get; set; }
+    public ICollection<User> InvitedUsers { get; set; } = new List<User>();
 }

FictionArchive.Service.UserService/Models/IntegrationEvents/AuthUserAddedEvent.cs

@@ -1,16 +0,0 @@
-using FictionArchive.Service.Shared.Services.EventBus;
-
-namespace FictionArchive.Service.UserService.Models.IntegrationEvents;
-
-public class AuthUserAddedEvent : IIntegrationEvent
-{
-    public string OAuthProviderId { get; set; }
-    
-    public string InviterOAuthProviderId { get; set; }
-
-    // The email of the user that created the event
-    public string EventUserEmail { get; set; }
-
-    // The username of the user that created the event
-    public string EventUserUsername { get; set; }
-}

FictionArchive.Service.UserService/Models/IntegrationEvents/UserInvitedEvent.cs

@@ -0,0 +1,17 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+
+namespace FictionArchive.Service.UserService.Models.IntegrationEvents;
+
+public class UserInvitedEvent : IIntegrationEvent
+{
+    // Invited user info
+    public Guid InvitedUserId { get; set; }
+    public required string InvitedUsername { get; set; }
+    public required string InvitedEmail { get; set; }
+    public required string InvitedOAuthProviderId { get; set; }
+
+    // Inviter info
+    public Guid InviterId { get; set; }
+    public required string InviterUsername { get; set; }
+    public required string InviterOAuthProviderId { get; set; }
+}

FictionArchive.Service.UserService/Program.cs

@@ -1,11 +1,12 @@
+using System.Net.Http.Headers;
 using FictionArchive.Common.Extensions;
 using FictionArchive.Service.Shared;
 using FictionArchive.Service.Shared.Extensions;
 using FictionArchive.Service.Shared.Services.EventBus.Implementations;
 using FictionArchive.Service.UserService.GraphQL;
-using FictionArchive.Service.UserService.Models.IntegrationEvents;
 using FictionArchive.Service.UserService.Services;
-using FictionArchive.Service.UserService.Services.EventHandlers;
+using FictionArchive.Service.UserService.Services.AuthenticationClient;
+using FictionArchive.Service.UserService.Services.AuthenticationClient.Authentik;
 
 namespace FictionArchive.Service.UserService;
 
@@ -25,8 +26,7 @@ public class Program
             builder.Services.AddRabbitMQ(opt =>
             {
                 builder.Configuration.GetSection("RabbitMQ").Bind(opt);
-            })
-            .Subscribe<AuthUserAddedEvent, AuthUserAddedEventHandler>();
+            });
         }
 
         #endregion
@@ -38,6 +38,22 @@ public class Program
 
         #endregion
 
+        #region Authentik Client
+
+        builder.Services.Configure<AuthentikConfiguration>(
+            builder.Configuration.GetSection("Authentik"));
+
+        var authentikConfig = builder.Configuration.GetSection("Authentik").Get<AuthentikConfiguration>();
+        builder.Services.AddHttpClient<IAuthenticationServiceClient, AuthentikClient>(client =>
+            {
+                client.BaseAddress = new Uri(authentikConfig?.BaseUrl ?? "https://localhost");
+                client.DefaultRequestHeaders.Authorization =
+                    new AuthenticationHeaderValue("Bearer", authentikConfig?.ApiToken ?? "");
+            })
+            .AddStandardResilienceHandler();
+
+        #endregion
+
         builder.Services.RegisterDbContext<UserServiceDbContext>(
             builder.Configuration.GetConnectionString("DefaultConnection"),
             skipInfrastructure: isSchemaExport);

FictionArchive.Service.UserService/Services/AuthenticationClient/Authentik/AuthentikAddUserRequest.cs

@@ -0,0 +1,21 @@
+using Newtonsoft.Json;
+
+namespace FictionArchive.Service.UserService.Services.AuthenticationClient.Authentik;
+
+public class AuthentikAddUserRequest
+{
+    [JsonProperty("username")]
+    public required string Username { get; set; }
+
+    [JsonProperty("name")]
+    public required string DisplayName { get; set; }
+
+    [JsonProperty("email")]
+    public required string Email { get; set; }
+
+    [JsonProperty("is_active")]
+    public bool IsActive { get; set; } = true;
+
+    [JsonProperty("type")]
+    public string Type { get; } = "external";
+}

FictionArchive.Service.UserService/Services/AuthenticationClient/Authentik/AuthentikClient.cs

@@ -0,0 +1,88 @@
+using System.Text;
+using Microsoft.Extensions.Options;
+using Newtonsoft.Json;
+
+namespace FictionArchive.Service.UserService.Services.AuthenticationClient.Authentik;
+
+public class AuthentikClient : IAuthenticationServiceClient
+{
+    private readonly HttpClient _httpClient;
+    private readonly ILogger<AuthentikClient> _logger;
+    private readonly AuthentikConfiguration _configuration;
+
+    public AuthentikClient(
+        HttpClient httpClient,
+        ILogger<AuthentikClient> logger,
+        IOptions<AuthentikConfiguration> configuration)
+    {
+        _httpClient = httpClient;
+        _logger = logger;
+        _configuration = configuration.Value;
+    }
+
+    public async Task<AuthentikUserResponse?> CreateUserAsync(string username, string email, string displayName)
+    {
+        var request = new AuthentikAddUserRequest
+        {
+            Username = username,
+            Email = email,
+            DisplayName = displayName,
+            IsActive = true
+        };
+
+        try
+        {
+            var json = JsonConvert.SerializeObject(request);
+            var content = new StringContent(json, Encoding.UTF8, "application/json");
+            var response = await _httpClient.PostAsync("/api/v3/core/users/", content);
+
+            if (!response.IsSuccessStatusCode)
+            {
+                var errorContent = await response.Content.ReadAsStringAsync();
+                _logger.LogError(
+                    "Failed to create user in Authentik. Status: {StatusCode}, Error: {Error}",
+                    response.StatusCode, errorContent);
+                return null;
+            }
+
+            var responseJson = await response.Content.ReadAsStringAsync();
+            var userResponse = JsonConvert.DeserializeObject<AuthentikUserResponse>(responseJson);
+            _logger.LogInformation("Successfully created user {Username} in Authentik with pk {Pk}",
+                username, userResponse?.Pk);
+
+            return userResponse;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Exception while creating user {Username} in Authentik", username);
+            return null;
+        }
+    }
+
+    public async Task<bool> SendRecoveryEmailAsync(int authentikUserId)
+    {
+        try
+        {
+            var response = await _httpClient.PostAsync(
+                $"/api/v3/core/users/{authentikUserId}/recovery_email/?email_stage={_configuration.EmailStageId}",
+                null);
+
+            if (!response.IsSuccessStatusCode)
+            {
+                var errorContent = await response.Content.ReadAsStringAsync();
+                _logger.LogError(
+                    "Failed to send recovery email for user {UserId}. Status: {StatusCode}, Error: {Error}",
+                    authentikUserId, response.StatusCode, errorContent);
+                return false;
+            }
+
+            _logger.LogInformation("Successfully sent recovery email to Authentik user {UserId}", authentikUserId);
+            return true;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Exception while sending recovery email to Authentik user {UserId}", authentikUserId);
+            return false;
+        }
+    }
+}

FictionArchive.Service.UserService/Services/AuthenticationClient/Authentik/AuthentikConfiguration.cs

@@ -0,0 +1,8 @@
+namespace FictionArchive.Service.UserService.Services.AuthenticationClient.Authentik;
+
+public class AuthentikConfiguration
+{
+    public string BaseUrl { get; set; } = string.Empty;
+    public string ApiToken { get; set; } = string.Empty;
+    public string EmailStageId { get; set; }
+}

FictionArchive.Service.UserService/Services/AuthenticationClient/Authentik/AuthentikUserResponse.cs

@@ -0,0 +1,27 @@
+using Newtonsoft.Json;
+
+namespace FictionArchive.Service.UserService.Services.AuthenticationClient.Authentik;
+
+public class AuthentikUserResponse
+{
+    [JsonProperty("pk")]
+    public int Pk { get; set; }
+
+    [JsonProperty("username")]
+    public string Username { get; set; } = string.Empty;
+
+    [JsonProperty("name")]
+    public string Name { get; set; } = string.Empty;
+
+    [JsonProperty("email")]
+    public string Email { get; set; } = string.Empty;
+
+    [JsonProperty("is_active")]
+    public bool IsActive { get; set; }
+
+    [JsonProperty("is_superuser")]
+    public bool IsSuperuser { get; set; }
+
+    [JsonProperty("uid")]
+    public string Uid { get; set; } = string.Empty;
+}

FictionArchive.Service.UserService/Services/AuthenticationClient/IAuthenticationServiceClient.cs

@@ -0,0 +1,22 @@
+using FictionArchive.Service.UserService.Services.AuthenticationClient.Authentik;
+
+namespace FictionArchive.Service.UserService.Services.AuthenticationClient;
+
+public interface IAuthenticationServiceClient
+{
+    /// <summary>
+    /// Creates a new user in the authentication provider.
+    /// </summary>
+    /// <param name="username">The username for the new user</param>
+    /// <param name="email">The email address for the new user</param>
+    /// <param name="displayName">The display name for the new user</param>
+    /// <returns>The created user response, or null if creation failed</returns>
+    Task<AuthentikUserResponse?> CreateUserAsync(string username, string email, string displayName);
+
+    /// <summary>
+    /// Sends a password recovery email to the user.
+    /// </summary>
+    /// <param name="authentikUserId">The Authentik user ID (pk)</param>
+    /// <returns>True if the email was sent successfully, false otherwise</returns>
+    Task<bool> SendRecoveryEmailAsync(int authentikUserId);
+}

FictionArchive.Service.UserService/Services/EventHandlers/AuthUserAddedEventHandler.cs

@@ -1,23 +0,0 @@
-using FictionArchive.Service.Shared.Services.EventBus;
-using FictionArchive.Service.UserService.Models.IntegrationEvents;
-using FictionArchive.Service.UserService.Models.Database;
-using Microsoft.EntityFrameworkCore; // Add this line to include the UserModel
-
-namespace FictionArchive.Service.UserService.Services.EventHandlers;
-
-public class AuthUserAddedEventHandler : IIntegrationEventHandler<AuthUserAddedEvent>
-{
-    private readonly UserManagementService _userManagementService;
-    private readonly ILogger<AuthUserAddedEventHandler> _logger;
-
-    public AuthUserAddedEventHandler(UserServiceDbContext dbContext, ILogger<AuthUserAddedEventHandler> logger, UserManagementService userManagementService)
-    {
-        _logger = logger;
-        _userManagementService = userManagementService;
-    }
-
-    public async Task Handle(AuthUserAddedEvent @event)
-    {
-        await _userManagementService.RegisterUser(@event.EventUserUsername, @event.EventUserEmail, @event.OAuthProviderId, @event.InviterOAuthProviderId);
-    }
-}

FictionArchive.Service.UserService/Services/UserManagementService.cs

@@ -1,4 +1,7 @@
+using FictionArchive.Service.Shared.Services.EventBus;
 using FictionArchive.Service.UserService.Models.Database;
+using FictionArchive.Service.UserService.Models.IntegrationEvents;
+using FictionArchive.Service.UserService.Services.AuthenticationClient;
 using Microsoft.EntityFrameworkCore;
 
 namespace FictionArchive.Service.UserService.Services;
@@ -7,39 +10,142 @@ public class UserManagementService
 {
     private readonly ILogger<UserManagementService> _logger;
     private readonly UserServiceDbContext _dbContext;
+    private readonly IAuthenticationServiceClient _authClient;
+    private readonly IEventBus _eventBus;
 
-    public UserManagementService(UserServiceDbContext dbContext, ILogger<UserManagementService> logger)
+    public UserManagementService(
+        UserServiceDbContext dbContext,
+        ILogger<UserManagementService> logger,
+        IAuthenticationServiceClient authClient,
+        IEventBus eventBus)
     {
         _dbContext = dbContext;
         _logger = logger;
+        _authClient = authClient;
+        _eventBus = eventBus;
     }
 
-    public async Task<User> RegisterUser(string username, string email, string oAuthProviderId,
-        string? inviterOAuthProviderId)
+    /// <summary>
+    /// Invites a new user by creating them in Authentik, saving to the database, and sending a recovery email.
+    /// </summary>
+    /// <param name="inviter">The user sending the invite</param>
+    /// <param name="email">Email address of the invitee</param>
+    /// <param name="username">Username for the invitee</param>
+    /// <returns>The created user, or null if the invite failed</returns>
+    public async Task<User?> InviteUserAsync(User inviter, string email, string username)
     {
-        var newUser = new User();
-        User? inviter =
-            await _dbContext.Users.FirstOrDefaultAsync(user => user.OAuthProviderId == inviterOAuthProviderId);
-        if (inviter == null && inviterOAuthProviderId != null)
+        // Check if inviter has available invites
+        if (inviter.AvailableInvites <= 0)
         {
-            _logger.LogCritical(
-                "A user with OAuthProviderId {OAuthProviderId} was marked as having inviter with OAuthProviderId {inviterOAuthProviderId}, but no user was found with that value.",
-                inviterOAuthProviderId, inviterOAuthProviderId);
-            newUser.Disabled = true;
+            _logger.LogWarning("User {InviterId} has no available invites", inviter.Id);
+            return null;
         }
 
-        newUser.Username = username;
-        newUser.Email = email;
-        newUser.OAuthProviderId = oAuthProviderId;
+        // Check if email is already in use
+        var existingUser = await _dbContext.Users
+            .AsQueryable()
+            .FirstOrDefaultAsync(u => u.Email == email);
 
-        _dbContext.Users.Add(newUser); // Add the new user to the DbContext
-        await _dbContext.SaveChangesAsync(); // Save changes to the database
+        if (existingUser != null)
+        {
+            _logger.LogWarning("Email {Email} is already in use", email);
+            return null;
+        }
+
+        // Check if username is already in use
+        var existingUsername = await _dbContext.Users
+            .AsQueryable()
+            .FirstOrDefaultAsync(u => u.Username == username);
+
+        if (existingUsername != null)
+        {
+            _logger.LogWarning("Username {Username} is already in use", username);
+            return null;
+        }
+
+        // Create user in Authentik
+        var authentikUser = await _authClient.CreateUserAsync(username, email, username);
+        if (authentikUser == null)
+        {
+            _logger.LogError("Failed to create user {Username} in Authentik", username);
+            return null;
+        }
+
+        // Send recovery email via Authentik
+        var emailSent = await _authClient.SendRecoveryEmailAsync(authentikUser.Pk);
+        if (!emailSent)
+        {
+            _logger.LogWarning(
+                "User {Username} was created in Authentik but recovery email failed to send. Authentik pk: {Pk}",
+                username, authentikUser.Pk);
+            // Continue anyway - the user is created, admin can resend email manually
+        }
+
+        // Create user in local database
+        var newUser = new User
+        {
+            Username = username,
+            Email = email,
+            OAuthProviderId = authentikUser.Pk.ToString(),
+            Disabled = false,
+            AvailableInvites = 0,
+            InviterId = inviter.Id
+        };
+
+        _dbContext.Users.Add(newUser);
+
+        // Decrement inviter's available invites
+        inviter.AvailableInvites--;
+
+        await _dbContext.SaveChangesAsync();
+
+        await _eventBus.Publish(new UserInvitedEvent
+        {
+            InvitedUserId = newUser.Id,
+            InvitedUsername = newUser.Username,
+            InvitedEmail = newUser.Email,
+            InvitedOAuthProviderId = newUser.OAuthProviderId,
+            InviterId = inviter.Id,
+            InviterUsername = inviter.Username,
+            InviterOAuthProviderId = inviter.OAuthProviderId
+        });
+
+        _logger.LogInformation(
+            "User {Username} was successfully invited by {InviterId}. New user id: {NewUserId}",
+            username, inviter.Id, newUser.Id);
 
         return newUser;
     }
 
+    /// <summary>
+    /// Gets a user by their OAuth provider ID (Authentik UID).
+    /// </summary>
+    public async Task<User?> GetUserByOAuthProviderIdAsync(string oAuthProviderId)
+    {
+        return await _dbContext.Users
+            .AsQueryable()
+            .FirstOrDefaultAsync(u => u.OAuthProviderId == oAuthProviderId);
+    }
+
+    /// <summary>
+    /// Gets all users as a queryable for GraphQL.
+    /// </summary>
     public IQueryable<User> GetUsers()
     {
         return _dbContext.Users.AsQueryable();
     }
+
+    /// <summary>
+    /// Gets all users invited by a specific user.
+    /// </summary>
+    /// <param name="inviterId">The ID of the user who sent the invites</param>
+    /// <returns>List of users invited by the specified user</returns>
+    public async Task<List<User>> GetInvitedByUserAsync(Guid inviterId)
+    {
+        return await _dbContext.Users
+            .AsQueryable()
+            .Where(u => u.InviterId == inviterId)
+            .OrderByDescending(u => u.CreatedTime)
+            .ToListAsync();
+    }
 }

FictionArchive.Service.UserService/appsettings.json

@@ -12,6 +12,11 @@
     "ConnectionString": "amqp://localhost",
     "ClientIdentifier": "UserService"
   },
+  "Authentik": {
+    "BaseUrl": "https://auth.orfl.xyz",
+    "ApiToken": "REPLACE_ME",
+    "EmailStageId": "10df0c18-8802-4ec7-852e-3cdd355514d3"
+  },
   "AllowedHosts": "*",
   "OIDC": {
     "Authority": "https://auth.orfl.xyz/application/o/fiction-archive/",

FictionArchive.sln

@@ -1,5 +1,6 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
+#
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FictionArchive.Common", "FictionArchive.Common\FictionArchive.Common.csproj", "{ABF1BA10-9E76-45BE-9947-E20445A68147}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FictionArchive.API", "FictionArchive.API\FictionArchive.API.csproj", "{420CC1A1-9DBC-40EC-B9E3-D4B25D71B9A9}"
@@ -14,12 +15,14 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FictionArchive.Service.Sche
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FictionArchive.Service.UserService", "FictionArchive.Service.UserService\FictionArchive.Service.UserService.csproj", "{EE4D4795-2F79-4614-886D-AF8DA77120AC}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FictionArchive.Service.AuthenticationService", "FictionArchive.Service.AuthenticationService\FictionArchive.Service.AuthenticationService.csproj", "{70C4AE82-B01E-421D-B590-C0F47E63CD0C}"
-EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FictionArchive.Service.FileService", "FictionArchive.Service.FileService\FictionArchive.Service.FileService.csproj", "{EC64A336-F8A0-4BED-9CA3-1B05AD00631D}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FictionArchive.Service.NovelService.Tests", "FictionArchive.Service.NovelService.Tests\FictionArchive.Service.NovelService.Tests.csproj", "{166E645E-9DFB-44E8-8CC8-FA249A11679F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FictionArchive.Service.UserService.Tests", "FictionArchive.Service.UserService.Tests\FictionArchive.Service.UserService.Tests.csproj", "{10C38C89-983D-4544-8911-F03099F66AB8}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FictionArchive.Service.UserNovelDataService", "FictionArchive.Service.UserNovelDataService\FictionArchive.Service.UserNovelDataService.csproj", "{A278565B-D440-4AB9-B2E2-41BA3B3AD82A}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -54,10 +57,6 @@ Global
 		{EE4D4795-2F79-4614-886D-AF8DA77120AC}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EE4D4795-2F79-4614-886D-AF8DA77120AC}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{EE4D4795-2F79-4614-886D-AF8DA77120AC}.Release|Any CPU.Build.0 = Release|Any CPU
-		{70C4AE82-B01E-421D-B590-C0F47E63CD0C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{70C4AE82-B01E-421D-B590-C0F47E63CD0C}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{70C4AE82-B01E-421D-B590-C0F47E63CD0C}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{70C4AE82-B01E-421D-B590-C0F47E63CD0C}.Release|Any CPU.Build.0 = Release|Any CPU
 		{EC64A336-F8A0-4BED-9CA3-1B05AD00631D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{EC64A336-F8A0-4BED-9CA3-1B05AD00631D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EC64A336-F8A0-4BED-9CA3-1B05AD00631D}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -66,5 +65,13 @@ Global
 		{166E645E-9DFB-44E8-8CC8-FA249A11679F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{166E645E-9DFB-44E8-8CC8-FA249A11679F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{166E645E-9DFB-44E8-8CC8-FA249A11679F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{10C38C89-983D-4544-8911-F03099F66AB8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{10C38C89-983D-4544-8911-F03099F66AB8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{10C38C89-983D-4544-8911-F03099F66AB8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{10C38C89-983D-4544-8911-F03099F66AB8}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A278565B-D440-4AB9-B2E2-41BA3B3AD82A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A278565B-D440-4AB9-B2E2-41BA3B3AD82A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A278565B-D440-4AB9-B2E2-41BA3B3AD82A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A278565B-D440-4AB9-B2E2-41BA3B3AD82A}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal

docker-compose.yml

@@ -4,25 +4,34 @@ services:
   # ===========================================
   postgres:
     image: postgres:16-alpine
+    networks:
+      fictionarchive:
+        ipv4_address: 172.20.0.10
     environment:
       POSTGRES_USER: ${POSTGRES_USER:-postgres}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
     volumes:
-      - postgres_data:/var/lib/postgresql/data
+      - /srv/docker_volumes/fictionarchive/postgres:/var/lib/postgresql/data
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres"]
       interval: 5s
       timeout: 5s
       retries: 5
     restart: unless-stopped
+    ports:
+      - 4321:5432
 
   rabbitmq:
     image: rabbitmq:3-management-alpine
+    networks:
+      fictionarchive:
+        ipv4_address: 172.20.0.11
     environment:
       RABBITMQ_DEFAULT_USER: ${RABBITMQ_USER:-guest}
       RABBITMQ_DEFAULT_PASS: ${RABBITMQ_PASSWORD:-guest}
+      RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS: -rabbit max_message_size 536870912
     volumes:
-      - rabbitmq_data:/var/lib/rabbitmq
+      - /srv/docker_volumes/fictionarchive/rabbitmq:/var/lib/rabbitmq
     healthcheck:
       test: ["CMD", "rabbitmq-diagnostics", "check_running"]
       interval: 10s
@@ -30,6 +39,37 @@ services:
       retries: 5
     restart: unless-stopped
 
+  # ===========================================
+  # VPN Container
+  # ===========================================
+  vpn:
+    image: dperson/openvpn-client
+    networks:
+      fictionarchive:
+        ipv4_address: 172.20.0.20
+        aliases:
+          - novel-service
+    cap_add:
+      - NET_ADMIN
+    devices:
+      - /dev/net/tun
+    volumes:
+      - /srv/docker_volumes/korean_vpn:/vpn
+    dns:
+      - 192.168.3.1
+    environment:
+      - DNS=1.1.1.1,8.8.8.8
+    extra_hosts:
+      - "postgres:172.20.0.10"
+      - "rabbitmq:172.20.0.11"
+    healthcheck:
+      test: ["CMD", "ping", "-c", "1", "-W", "5", "1.1.1.1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+    restart: unless-stopped
+
   # ===========================================
   # Backend Services
   # ===========================================
@@ -37,50 +77,27 @@ services:
     image: git.orfl.xyz/conco/fictionarchive-novel-service:latest
     environment:
       ConnectionStrings__DefaultConnection: Host=postgres;Database=FictionArchive_NovelService;Username=${POSTGRES_USER:-postgres};Password=${POSTGRES_PASSWORD:-postgres}
-      ConnectionStrings__RabbitMQ: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
+      RabbitMQ__ConnectionString: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
       Novelpia__Username: ${NOVELPIA_USERNAME}
       Novelpia__Password: ${NOVELPIA_PASSWORD}
-      NovelUpdateService__PendingImageUrl: https://files.fictionarchive.orfl.xyz/api/pendingupload.png
-    healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/healthz"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
+      UpdateService__PendingImageUrl: https://files.fictionarchive.orfl.xyz/api/pendingupload.png
     depends_on:
       postgres:
         condition: service_healthy
       rabbitmq:
         condition: service_healthy
-    restart: unless-stopped
-
-  translation-service:
-    image: git.orfl.xyz/conco/fictionarchive-translation-service:latest
-    environment:
-      ConnectionStrings__DefaultConnection: Host=postgres;Database=FictionArchive_TranslationService;Username=${POSTGRES_USER:-postgres};Password=${POSTGRES_PASSWORD:-postgres}
-      ConnectionStrings__RabbitMQ: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
-      DeepL__ApiKey: ${DEEPL_API_KEY}
-    healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/healthz"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
-    depends_on:
-      postgres:
-        condition: service_healthy
-      rabbitmq:
+      vpn:
         condition: service_healthy
+    network_mode: "service:vpn"
     restart: unless-stopped
 
   scheduler-service:
     image: git.orfl.xyz/conco/fictionarchive-scheduler-service:latest
+    networks:
+      - fictionarchive
     environment:
       ConnectionStrings__DefaultConnection: Host=postgres;Database=FictionArchive_SchedulerService;Username=${POSTGRES_USER:-postgres};Password=${POSTGRES_PASSWORD:-postgres}
-      ConnectionStrings__RabbitMQ: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
-    healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/healthz"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
+      RabbitMQ__ConnectionString: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
     depends_on:
       postgres:
         condition: service_healthy
@@ -90,14 +107,14 @@ services:
 
   user-service:
     image: git.orfl.xyz/conco/fictionarchive-user-service:latest
+    networks:
+      - fictionarchive
     environment:
       ConnectionStrings__DefaultConnection: Host=postgres;Database=FictionArchive_UserService;Username=${POSTGRES_USER:-postgres};Password=${POSTGRES_PASSWORD:-postgres}
-      ConnectionStrings__RabbitMQ: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
-    healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/healthz"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
+      RabbitMQ__ConnectionString: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
+      Authentik__BaseUrl: https://auth.orfl.xyz
+      Authentik__ApiToken: ${AUTHENTIK_API_TOKEN}
+      Authentik__EmailStageId: 10df0c18-8802-4ec7-852e-3cdd355514d3
     depends_on:
       postgres:
         condition: service_healthy
@@ -105,42 +122,35 @@ services:
         condition: service_healthy
     restart: unless-stopped
 
-  authentication-service:
-    image: git.orfl.xyz/conco/fictionarchive-authentication-service:latest
+  usernoveldata-service:
+    image: git.orfl.xyz/conco/fictionarchive-usernoveldata-service:latest
+    networks:
+      - fictionarchive
     environment:
-      ConnectionStrings__RabbitMQ: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
-    healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/healthz"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
+      ConnectionStrings__DefaultConnection: Host=postgres;Database=FictionArchive_UserNovelDataService;Username=${POSTGRES_USER:-postgres};Password=${POSTGRES_PASSWORD:-postgres}
+      RabbitMQ__ConnectionString: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
     depends_on:
+      postgres:
+        condition: service_healthy
       rabbitmq:
         condition: service_healthy
     restart: unless-stopped
 
   file-service:
     image: git.orfl.xyz/conco/fictionarchive-file-service:latest
+    networks:
+      - web
+      - fictionarchive
     environment:
-      ConnectionStrings__RabbitMQ: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
-      S3__Endpoint: ${S3_ENDPOINT:-https://s3.orfl.xyz}
-      S3__Bucket: ${S3_BUCKET:-fictionarchive}
+      RabbitMQ__ConnectionString: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
       S3__AccessKey: ${S3_ACCESS_KEY}
       S3__SecretKey: ${S3_SECRET_KEY}
-      Proxy__BaseUrl: https://files.orfl.xyz/api
-      OIDC__Authority: https://auth.orfl.xyz/application/o/fictionarchive/
-      OIDC__ClientId: fictionarchive-files
-      OIDC__Audience: fictionarchive-api
-    healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/healthz"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
+      ProxyConfiguration__BaseUrl: https://files.fictionarchive.orfl.xyz/api
     labels:
       - "traefik.enable=true"
-      - "traefik.http.routers.file-service.rule=Host(`files.orfl.xyz`)"
-      - "traefik.http.routers.file-service.entrypoints=websecure"
-      - "traefik.http.routers.file-service.tls.certresolver=letsencrypt"
+      - "traefik.http.routers.file-service.rule=Host(`files.fictionarchive.orfl.xyz`)"
+      - "traefik.http.routers.file-service.tls=true"
+      - "traefik.http.routers.file-service.tls.certresolver=lets-encrypt"
       - "traefik.http.services.file-service.loadbalancer.server.port=8080"
     depends_on:
       rabbitmq:
@@ -152,30 +162,23 @@ services:
   # ===========================================
   api-gateway:
     image: git.orfl.xyz/conco/fictionarchive-api:latest
+    networks:
+      - web
+      - fictionarchive
     environment:
-      ConnectionStrings__RabbitMQ: amqp://${RABBITMQ_USER:-guest}:${RABBITMQ_PASSWORD:-guest}@rabbitmq
-      OIDC__Authority: https://auth.orfl.xyz/application/o/fictionarchive/
-      OIDC__ClientId: fictionarchive-api
-      OIDC__Audience: fictionarchive-api
       Cors__AllowedOrigin: https://fictionarchive.orfl.xyz
-    healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/healthz"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
     labels:
       - "traefik.enable=true"
       - "traefik.http.routers.api-gateway.rule=Host(`api.fictionarchive.orfl.xyz`)"
-      - "traefik.http.routers.api-gateway.entrypoints=websecure"
-      - "traefik.http.routers.api-gateway.tls.certresolver=letsencrypt"
+      - "traefik.http.routers.api-gateway.tls=true"
+      - "traefik.http.routers.api-gateway.tls.certresolver=lets-encrypt"
       - "traefik.http.services.api-gateway.loadbalancer.server.port=8080"
     depends_on:
       - novel-service
-      - translation-service
       - scheduler-service
-      - user-service
-      - authentication-service
       - file-service
+      - user-service
+      - usernoveldata-service
     restart: unless-stopped
 
   # ===========================================
@@ -183,20 +186,21 @@ services:
   # ===========================================
   frontend:
     image: git.orfl.xyz/conco/fictionarchive-frontend:latest
-    healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost/"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
+    networks:
+      - web
     labels:
-      - "traefik.enable=true"
-      - "traefik.http.routers.frontend.rule=Host(`fictionarchive.orfl.xyz`)"
-      - "traefik.http.routers.frontend.entrypoints=websecure"
-      - "traefik.http.routers.frontend.tls.certresolver=letsencrypt"
-      - "traefik.http.services.frontend.loadbalancer.server.port=80"
+      - traefik.http.routers.fafrontend.rule=Host(`fictionarchive.orfl.xyz`)
+      - traefik.http.routers.fafrontend.tls=true
+      - traefik.http.routers.fafrontend.tls.certresolver=lets-encrypt
+      - traefik.http.services.fafrontend.loadbalancer.server.port=80
+      - traefik.enable=true
     restart: unless-stopped
 
-volumes:
-  postgres_data:
-  rabbitmq_data:
-  letsencrypt:
+networks:
+  web:
+    external: yes
+  fictionarchive:
+    ipam:
+      driver: default
+      config:
+        - subnet: 172.20.0.0/24