diff --git a/schemas/book.py b/schemas/book.py
index 4e6d3cd..bae9775 100644
--- a/schemas/book.py
+++ b/schemas/book.py
@@ -6,8 +6,11 @@ class BookBase(BaseModel):
     title: str = Field(..., min_length=1, max_length=200, description="Book title")
     description: Optional[str] = Field(None, description="Book description")
     isbn: str = Field(..., description="Book ISBN number")
-    publication_year: int = Field(..., ge=1000, le=9999, description="Year of publication")
     author_id: str = Field(..., description="ID of the book's author")
+    publication_year: int = Field(..., ge=1000, le=2100, description="Year of publication")
+    pages: int = Field(..., gt=0, description="Number of pages")
+    genre: str = Field(..., description="Book genre")
+    publisher: str = Field(..., description="Book publisher")
 
 class BookCreate(BookBase):
     class Config:
@@ -16,8 +19,11 @@ class BookCreate(BookBase):
                 "title": "The Great Gatsby",
                 "description": "A novel by F. Scott Fitzgerald",
                 "isbn": "978-0743273565",
+                "author_id": "author_uuid",
                 "publication_year": 1925,
-                "author_id": "author_uuid_here"
+                "pages": 180,
+                "genre": "Fiction",
+                "publisher": "Scribner"
             }
         }
 
@@ -32,7 +38,10 @@ class Book(BookBase):
                 "title": "The Great Gatsby",
                 "description": "A novel by F. Scott Fitzgerald",
                 "isbn": "978-0743273565",
+                "author_id": "author_uuid",
                 "publication_year": 1925,
-                "author_id": "author_uuid_here"
+                "pages": 180,
+                "genre": "Fiction",
+                "publisher": "Scribner"
             }
         }
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