diff --git a/schemas/book.py b/schemas/book.py
index 2dc1900..2f8485a 100644
--- a/schemas/book.py
+++ b/schemas/book.py
@@ -1,16 +1,13 @@
 from pydantic import BaseModel, Field
 from typing import Optional
 from datetime import datetime
+from uuid import UUID
 
 class BookBase(BaseModel):
     title: str = Field(..., min_length=1, max_length=200, description="Book title")
     author: str = Field(..., min_length=1, max_length=100, description="Book author")
     isbn: str = Field(..., min_length=10, max_length=13, description="Book ISBN")
-    publication_year: Optional[int] = Field(None, ge=1000, le=2100, description="Year of publication")
-    genre: Optional[str] = Field(None, max_length=50, description="Book genre")
     description: Optional[str] = Field(None, max_length=1000, description="Book description")
-    price: Optional[int] = Field(None, ge=0, description="Book price")
-    available: bool = Field(default=True, description="Book availability status")
 
 class BookCreate(BookBase):
     class Config:
@@ -19,16 +16,12 @@ class BookCreate(BookBase):
                 "title": "The Great Gatsby",
                 "author": "F. Scott Fitzgerald",
                 "isbn": "9780743273565",
-                "publication_year": 1925,
-                "genre": "Fiction",
-                "description": "A story of the fabulously wealthy Jay Gatsby",
-                "price": 1499,
-                "available": True
+                "description": "A story of the fabulously wealthy Jay Gatsby"
             }
         }
 
 class Book(BookBase):
-    id: int = Field(..., description="Book ID")
+    id: UUID
     created_at: datetime
     updated_at: datetime
 
@@ -36,15 +29,11 @@ class Book(BookBase):
         orm_mode = True
         schema_extra = {
             "example": {
-                "id": 1,
+                "id": "550e8400-e29b-41d4-a716-446655440000",
                 "title": "The Great Gatsby",
                 "author": "F. Scott Fitzgerald",
                 "isbn": "9780743273565",
-                "publication_year": 1925,
-                "genre": "Fiction",
                 "description": "A story of the fabulously wealthy Jay Gatsby",
-                "price": 1499,
-                "available": True,
                 "created_at": "2023-01-01T00:00:00",
                 "updated_at": "2023-01-01T00:00:00"
             }