diff --git a/Epub/KoeBook.Epub/Services/AnalyzerService _CoverFileBytes.cs b/Epub/KoeBook.Epub/Services/AnalyzerService _CoverFileBytes.cs
deleted file mode 100644
index 6e0673c..0000000
--- a/Epub/KoeBook.Epub/Services/AnalyzerService _CoverFileBytes.cs	
+++ /dev/null
@@ -1,13 +0,0 @@
-using System.Text;
-using System.Text.RegularExpressions;
-using KoeBook.Core.Contracts.Services;
-using KoeBook.Core.Models;
-using KoeBook.Epub;
-using KoeBook.Epub.Services;
-
-namespace KoeBook.Epub.Services;
-
-public partial class AnalyzerService
-{
-    public ReadOnlySpan<byte> CoverFile => [89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0xa, 0x0, 0x0, 0x0, 0xd, 0x49, 0x48, 0x44, 0x52, 0x0, 0x0, 0x1, 0x2c, 0x0, 0x0, 0x1, 0x90, 0x8, 0x6, 0x0, 0x0, 0x0, 0x14, 0x75, 0x5d, 0x7b, 0x0, 0x0, 0x0, 0x1, 0x73, 0x52, 0x47, 0x42, 0x0, 0xae, 0xce, 0x1c, 0xe9, 0x0, 0x0, 0x0, 0x4, 0x67, 0x41, 0x4d, 0x41, 0x0, 0x0, 0xb1, 0x8f, 0xb, 0xfc, 0x61, 0x5, 0x0, 0x0, 0x0, 0x9, 0x70, 0x48, 0x59, 0x73, 0x0, 0x0, 0x1d, 0x87, 0x0, 0x0, 0x1d, 0x87, 0x1, 0x8f, 0xe5, 0xf1, 0x65, 0x0, 0x0, 0x4, 0xfa, 0x49, 0x44, 0x41, 0x54, 0x78, 0x5e, 0xed, 0xd4, 0x1, 0xd, 0x0, 0x0, 0xc, 0xc3, 0xa0, 0xfb, 0x37, 0xbd, 0xeb, 0x68, 0x2, 0x22, 0xb8, 0x1, 0x44, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 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0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 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0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x22, 0xb6, 0x7, 0x7c, 0x3f, 0x1a, 0x75, 0x8a, 0x71, 0x90, 0x2f, 0x0, 0x0, 0x0, 0x0, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82];
-}
diff --git a/Epub/KoeBook.Epub/Services/AnalyzerService.cs b/Epub/KoeBook.Epub/Services/AnalyzerService.cs
index 044102c..a61f9b6 100644
--- a/Epub/KoeBook.Epub/Services/AnalyzerService.cs
+++ b/Epub/KoeBook.Epub/Services/AnalyzerService.cs
@@ -13,20 +13,19 @@ public partial class AnalyzerService(
     IScraperSelectorService scrapingService,
     IEpubDocumentStoreService epubDocumentStoreService,
     ILlmAnalyzerService llmAnalyzerService,
-    AiStoryAnalyzerService aiStoryAnalyzerService) : IAnalyzerService
+    AiStoryAnalyzerService aiStoryAnalyzerService,
+    ICreateCoverFileService createCoverFileService) : IAnalyzerService
 {
     private readonly IScraperSelectorService _scrapingService = scrapingService;
     private readonly IEpubDocumentStoreService _epubDocumentStoreService = epubDocumentStoreService;
     private readonly ILlmAnalyzerService _llmAnalyzerService = llmAnalyzerService;
     private readonly AiStoryAnalyzerService _aiStoryAnalyzerService = aiStoryAnalyzerService;
+    private readonly ICreateCoverFileService _createCoverFileService = createCoverFileService;
 
     public async ValueTask<BookScripts> AnalyzeAsync(BookProperties bookProperties, string tempDirectory, CancellationToken cancellationToken)
     {
         Directory.CreateDirectory(tempDirectory);
         var coverFilePath = Path.Combine(tempDirectory, "Cover.png");
-        using var fs = File.Create(coverFilePath);
-        await fs.WriteAsync(CoverFile.ToArray(), cancellationToken);
-        await fs.FlushAsync(cancellationToken);
 
         var rubyReplaced = false;
         EpubDocument document;
@@ -44,6 +43,8 @@ public async ValueTask<BookScripts> AnalyzeAsync(BookProperties bookProperties,
                 default:
                     throw new UnreachableException($"SourceType: {bookProperties.SourceType}, Source: {bookProperties.Source}");
             }
+
+            _createCoverFileService.Create(document.Title, document.Author, coverFilePath);
         }
         catch (EbookException) { throw; }
         catch (Exception ex)
diff --git a/KoeBook.Core/Contracts/Services/ILlmStoryGeneratorService.cs b/KoeBook.Core/Contracts/Services/ILlmStoryGeneratorService.cs
deleted file mode 100644
index ea1ea9d..0000000
--- a/KoeBook.Core/Contracts/Services/ILlmStoryGeneratorService.cs
+++ /dev/null
@@ -1,8 +0,0 @@
-using KoeBook.Core.Models;
-
-namespace KoeBook.Core.Contracts.Services;
-
-internal interface ILlmStoryGeneratorService
-{
-    ValueTask<string> GenerateStoryAsync(StoryGenre storyGenre, string premise, CancellationToken cancellationToken);
-}
diff --git a/KoeBook.Core/Services/ClaudeStoryGeneratorService.cs b/KoeBook.Core/Services/ClaudeStoryGeneratorService.cs
index 4e6a605..3abf6de 100644
--- a/KoeBook.Core/Services/ClaudeStoryGeneratorService.cs
+++ b/KoeBook.Core/Services/ClaudeStoryGeneratorService.cs
@@ -3,11 +3,11 @@
 
 namespace KoeBook.Core.Services;
 
-internal class ClaudeStoryGeneratorService(IClaudeService claudeService) : ILlmStoryGeneratorService
+public class ClaudeStoryGeneratorService(IClaudeService claudeService) : IStoryCreatorService
 {
     private readonly IClaudeService _claudeService = claudeService;
 
-    public async ValueTask<string> GenerateStoryAsync(StoryGenre storyGenre, string premise, CancellationToken cancellationToken)
+    public async ValueTask<string> CreateStoryAsync(StoryGenre storyGenre, string premise, CancellationToken cancellationToken)
     {
         if (_claudeService.Messages is null)
         {
diff --git a/KoeBook.Test/DiTestBase.cs b/KoeBook.Test/DiTestBase.cs
index ed79f9e..3f6349a 100644
--- a/KoeBook.Test/DiTestBase.cs
+++ b/KoeBook.Test/DiTestBase.cs
@@ -1,4 +1,5 @@
 using KoeBook.Core;
+using KoeBook.Core.Contracts.Services;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 
@@ -17,6 +18,10 @@ protected static IHostBuilder CreateDefaultBuilder()
     {
         return Microsoft.Extensions.Hosting.Host
             .CreateDefaultBuilder()
-            .UseCoreStartup();
+            .UseCoreStartup()
+            .ConfigureServices(services =>
+            {
+                services.AddSingleton<ICreateCoverFileService, MockCreateCoverFileService>();
+            });
     }
 }
diff --git a/KoeBook.Test/MockCreateCoverFileService.cs b/KoeBook.Test/MockCreateCoverFileService.cs
new file mode 100644
index 0000000..d948eb1
--- /dev/null
+++ b/KoeBook.Test/MockCreateCoverFileService.cs
@@ -0,0 +1,13 @@
+using KoeBook.Core.Contracts.Services;
+
+namespace KoeBook.Test;
+
+internal class MockCreateCoverFileService : ICreateCoverFileService
+{
+    public static ReadOnlySpan<byte> CoverFile => [89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0xa, 0x0, 0x0, 0x0, 0xd, 0x49, 0x48, 0x44, 0x52, 0x0, 0x0, 0x1, 0x2c, 0x0, 0x0, 0x1, 0x90, 0x8, 0x6, 0x0, 0x0, 0x0, 0x14, 0x75, 0x5d, 0x7b, 0x0, 0x0, 0x0, 0x1, 0x73, 0x52, 0x47, 0x42, 0x0, 0xae, 0xce, 0x1c, 0xe9, 0x0, 0x0, 0x0, 0x4, 0x67, 0x41, 0x4d, 0x41, 0x0, 0x0, 0xb1, 0x8f, 0xb, 0xfc, 0x61, 0x5, 0x0, 0x0, 0x0, 0x9, 0x70, 0x48, 0x59, 0x73, 0x0, 0x0, 0x1d, 0x87, 0x0, 0x0, 0x1d, 0x87, 0x1, 0x8f, 0xe5, 0xf1, 0x65, 0x0, 0x0, 0x4, 0xfa, 0x49, 0x44, 0x41, 0x54, 0x78, 0x5e, 0xed, 0xd4, 0x1, 0xd, 0x0, 0x0, 0xc, 0xc3, 0xa0, 0xfb, 0x37, 0xbd, 0xeb, 0x68, 0x2, 0x22, 0xb8, 0x1, 0x44, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 0x2c, 0x20, 0x43, 0x58, 0x40, 0x86, 0xb0, 0x80, 0xc, 0x61, 0x1, 0x19, 0xc2, 0x2, 0x32, 0x84, 0x5, 0x64, 0x8, 0xb, 0xc8, 0x10, 0x16, 0x90, 0x21, 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0x82];
+
+    public void Create(string title, string author, string coverFilePath)
+    {
+        File.WriteAllBytes(coverFilePath, CoverFile.ToArray());
+    }
+}
diff --git a/KoeBook/App.xaml.cs b/KoeBook/App.xaml.cs
index 2a60e96..f7b88e1 100644
--- a/KoeBook/App.xaml.cs
+++ b/KoeBook/App.xaml.cs
@@ -4,10 +4,7 @@
 using KoeBook.Contracts.Services;
 using KoeBook.Core;
 using KoeBook.Core.Contracts.Services;
-using KoeBook.Core.Services;
 using KoeBook.Core.Services.Mocks;
-using KoeBook.Epub.Contracts.Services;
-using KoeBook.Epub.Services;
 using KoeBook.Models;
 using KoeBook.Notifications;
 using KoeBook.Services;
@@ -81,6 +78,7 @@ public App()
                 services.AddSingleton<INavigationService, NavigationService>();
                 services.AddSingleton<IDialogService, DialogService>();
                 services.AddSingleton<IDisplayStateChangeService, DisplayStateChangeService>();
+                services.AddSingleton<ICreateCoverFileService, CreateCoverFileService>();
 
                 // Views and ViewModels
                 services.AddTransient<SettingsViewModel>();
diff --git a/KoeBook/Startup.cs b/KoeBook/Startup.cs
index 304dc32..750fcb3 100644
--- a/KoeBook/Startup.cs
+++ b/KoeBook/Startup.cs
@@ -43,7 +43,8 @@ public static IHostBuilder UseCoreStartup(this IHostBuilder builder)
                 .AddSingleton<IScraperSelectorService, ScraperSelectorService>()
                 .AddSingleton<IScrapingService, ScrapingAozoraService>()
                 .AddSingleton<IScrapingService, ScrapingNaroService>()
-                .AddSingleton<AiStoryAnalyzerService>();
+                .AddSingleton<AiStoryAnalyzerService>()
+                .AddSingleton<IStoryCreatorService, ClaudeStoryGeneratorService>();
             services.AddSingleton<IEpubCreateService, EpubCreateService>();
             services.AddSingleton<ISplitBraceService, SplitBraceService>();
             services.AddSingleton<IFileExtensionService, FileExtensionService>();
diff --git a/KoeBook/appsettings.json b/KoeBook/appsettings.json
index a14bec2..f333552 100644
--- a/KoeBook/appsettings.json
+++ b/KoeBook/appsettings.json
@@ -8,6 +8,6 @@
         "IEpubGenerateService": false,
         "ISoundGenerationSelectorService": false,
         "ISoundGenerationService": false,
-        "IStoryCreaterService": true
+        "IStoryCreaterService": false
     }
 }