diff --git a/tsukanova_irina_lab_3/author_service/author_service.py b/tsukanova_irina_lab_3/author_service/author_service.py
index 7240f45..367cf3a 100644
--- a/tsukanova_irina_lab_3/author_service/author_service.py
+++ b/tsukanova_irina_lab_3/author_service/author_service.py
@@ -1,11 +1,11 @@
 from flask import Flask, jsonify, request
-from uuid import uuid1
+from uuid import uuid4
 import uuid
 
 
 class Author:
     def __init__(self, name, surname):
-        self.uuid_: uuid = uuid1()
+        self.uuid_: uuid = uuid4()
         self.name: str = name
         self.surname: str = surname
 
@@ -35,7 +35,7 @@ def get_all():
     return list_jsonify(), 200
 
 
-@app.route('/<uuid:uuid>', methods=['GET'])
+@app.route('/<uuid:uuid_>', methods=['GET'])
 def get_one(uuid_):
     for author in authors:
         if author.uuid_ == uuid_:
@@ -57,7 +57,7 @@ def create():
     return get_one(new_author.uuid_)
 
 
-@app.route('/<uuid:uuid>', methods=['PUT'])
+@app.route('/<uuid:uuid_>', methods=['PUT'])
 def update_by_id(uuid_):
     data = request.json
     new_name = data.get('name', None)
@@ -74,12 +74,12 @@ def update_by_id(uuid_):
     return 'Автор с таким uuid не был найден', 404
 
 
-@app.route('/<uuid:uuid>', methods=['DELETE'])
+@app.route('/<uuid:uuid_>', methods=['DELETE'])
 def delete(uuid_):
     for author in authors:
         if author.uuid_ == uuid_:
             authors.remove(author)
-            return 200
+            return '', 200
 
     return 'Автор с таким uuid не был найден', 404
 
diff --git a/tsukanova_irina_lab_3/book_service/book_service.py b/tsukanova_irina_lab_3/book_service/book_service.py
index e69de29..bbd9c7e 100644
--- a/tsukanova_irina_lab_3/book_service/book_service.py
+++ b/tsukanova_irina_lab_3/book_service/book_service.py
@@ -0,0 +1,32 @@
+from flask import Flask, jsonify, request
+from uuid import uuid4
+import uuid
+from author_service.author_service import Author
+
+
+class Book:
+    def __init__(self, title, year, author_id):
+        self.uuid_: uuid = uuid4()
+        self.title: str = title
+        self.year: int = year
+        self.author_id: uuid = author_id
+
+    def to_dict(self, author: Author):
+        return {
+            'title': self.title,
+            'year': self.year,
+            'author_id': self.author_id,
+            'author_info': author.to_dict(),
+        }
+
+
+app = Flask(__name__)
+
+books: list[Book] = [
+    Book(title='Garden', year=1977, author_id=1),
+    Book(title='New York', year=1977, author_id=1),
+    Book(title='The story of flowers', year=1977, author_id=1),
+    Book(title='Little Rock', year=1977, author_id=1),
+    Book(title='One Piece', year=1977, author_id=1),
+    Book(title='Clack clover', year=1977, author_id=1),
+]