diff --git a/Source/DataLayer/EntityExtensions.cs b/Source/DataLayer/EntityExtensions.cs
index 02e56d66..9bfe1aff 100644
--- a/Source/DataLayer/EntityExtensions.cs
+++ b/Source/DataLayer/EntityExtensions.cs
@@ -61,7 +61,15 @@ namespace DataLayer
                 .Distinct()
                 .ToArray();
 
-		public static string[] CategoriesIds(this Book book)
+        public static string[] AllCategoryNames(this Book book)
+            => book.CategoriesLink?.Any() is not true ? Array.Empty<string>()
+            : book
+                .CategoriesLink
+                .SelectMany(cl => cl.CategoryLadder.Categories)
+                .Select(c => c.Name)
+                .ToArray();
+
+		public static string[] AllCategoryIds(this Book book)
             => book.CategoriesLink?.Any() is not true ? null
             : book
                 .CategoriesLink
diff --git a/Source/LibationSearchEngine/SearchEngine.cs b/Source/LibationSearchEngine/SearchEngine.cs
index 1b55d6e3..05e01472 100644
--- a/Source/LibationSearchEngine/SearchEngine.cs
+++ b/Source/LibationSearchEngine/SearchEngine.cs
@@ -41,7 +41,8 @@ namespace LibationSearchEngine
             { FieldType.String, lb => lb.Book.Publisher, nameof(Book.Publisher) },
             { FieldType.String, lb => lb.Book.SeriesNames(), "SeriesNames", "Narrator", "Series" },
             { FieldType.String, lb => string.Join(", ", lb.Book.SeriesLink.Select(s => s.Series.AudibleSeriesId)), "SeriesId" },
-            { FieldType.String, lb => lb.Book.CategoriesIds() is null ? null : string.Join(", ", lb.Book.CategoriesIds()), "Category", "Categories", "CategoriesId", "CategoryId", "CategoriesNames" },
+            { FieldType.String, lb => lb.Book.AllCategoryIds() is null ? null : string.Join(", ", lb.Book.AllCategoryIds()), "CategoriesId", "CategoryId" },
+            { FieldType.String, lb => lb.Book.AllCategoryNames() is null ? null : string.Join(", ", lb.Book.AllCategoryNames()), "Category", "Categories", "CategoriesNames" },
             { FieldType.String, lb => lb.Book.UserDefinedItem.Tags, TAGS.FirstCharToUpper() },
             { FieldType.String, lb => lb.Book.Locale, "Locale", "Region" },
             { FieldType.String, lb => lb.Account, "Account", "Email" },