diff --git a/books_collector.py b/books_collector.py
new file mode 100644
index 0000000..97b2567
--- /dev/null
+++ b/books_collector.py
@@ -0,0 +1,57 @@
+class BooksCollector:
+
+    def __init__(self):
+        self.books_genre = {}
+        self.favorites = []
+        self.genre = ['Фантастика', 'Ужасы', 'Детективы', 'Мультфильмы', 'Комедии']
+        self.genre_age_rating = ['Ужасы', 'Детективы']
+    
+    # добавляем новую книгу
+    def add_new_book(self, name):
+        if not self.books_genre.get(name) and 0 < len(name) < 41:
+            self.books_genre[name] = ''
+
+    # устанавливаем книге жанр 
+    def set_book_genre(self, name, genre):
+        if name in self.books_genre and genre in self.genre:
+            self.books_genre[name] = genre
+
+    # получаем жанр книги по её имени
+    def get_book_genre(self, name):
+        return self.books_genre.get(name)
+
+    # выводим список книг с определённым жанром
+    def get_books_with_specific_genre(self, genre):
+        books_with_specific_genre = []
+        if self.books_genre and genre in self.genre:
+            for name, book_genre in self.books_genre.items():
+                if book_genre == genre:
+                    books_with_specific_genre.append(name)
+        return books_with_specific_genre
+
+    # получаем словарь books_genre
+    def get_books_genre(self):
+        return self.books_genre
+
+    # возвращаем книги, подходящие детям
+    def get_books_for_children(self):
+        books_for_children = []
+        for name, genre in self.books_genre.items():
+            if genre not in self.genre_age_rating and genre in self.genre:
+                books_for_children.append(name)
+        return books_for_children
+
+    # добавляем книгу в Избранное
+    def add_book_in_favorites(self, name):
+        if name in self.books_genre:
+            if name not in self.favorites:
+                self.favorites.append(name)
+
+    # удаляем книгу из Избранного
+    def delete_book_from_favorites(self, name):
+        if name in self.favorites:
+            self.favorites.remove(name)
+
+    # получаем список Избранных книг
+    def get_list_of_favorites_books(self):
+        return self.favorites
diff --git a/test_books_collector.py b/test_books_collector.py
new file mode 100644
index 0000000..e238ec4
--- /dev/null
+++ b/test_books_collector.py
@@ -0,0 +1,99 @@
+import pytest
+from books_collector import BooksCollector
+
+
+@pytest.fixture
+def collector():
+    return BooksCollector()
+
+
+
+@pytest.mark.parametrize(
+    "name,should_add",
+    [
+        ("Короткое имя", True),
+        ("А" * 40, True),    
+        ("А" * 41, False),   
+        ("", False),
+    ]
+)
+def test_add_new_book_various_lengths(collector, name, should_add):
+    collector.add_new_book(name)
+    assert (name in collector.get_books_genre()) is should_add
+
+
+def test_add_new_book_duplicate_not_added(collector):
+    collector.add_new_book("Гарри Поттер")
+    collector.add_new_book("Гарри Поттер")
+    assert len(collector.get_books_genre()) == 1
+
+
+
+@pytest.mark.parametrize(
+    "genre,expected",
+    [
+        ("Фантастика", "Фантастика"),
+        ("Ужасы", "Ужасы"),
+        ("Романтика", ""),   
+)
+def test_set_book_genre_sets_only_when_valid(collector, genre, expected):
+    collector.add_new_book("Книга")
+    collector.set_book_genre("Книга", genre)
+    assert collector.books_genre["Книга"] == expected
+
+
+def test_get_book_genre_returns_value_when_present(collector):
+    collector.books_genre["Книга"] = "Комедии"
+    assert collector.get_book_genre("Книга") == "Комедии"
+
+
+def test_get_book_genre_returns_none_for_unknown(collector):
+    assert collector.get_book_genre("Несуществующая") is None
+
+
+
+def test_get_books_with_specific_genre_returns_only_matching(collector):
+    collector.add_new_book("Гарри Поттер")
+    collector.add_new_book("Оно")
+    collector.set_book_genre("Гарри Поттер", "Фантастика")
+    collector.set_book_genre("Оно", "Ужасы")
+    assert collector.get_books_with_specific_genre("Фантастика") == ["Гарри Поттер"]
+
+
+def test_get_books_genre_returns_dict(collector):
+    collector.add_new_book("Гарри Поттер")
+    result = collector.get_books_genre()
+    assert isinstance(result, dict)
+    assert "Гарри Поттер" in result
+
+
+def test_get_books_for_children_filters_out_age_restricted(collector):
+    collector.add_new_book("Оно")
+    collector.add_new_book("Мадагаскар")
+    collector.set_book_genre("Оно", "Ужасы")            
+    collector.set_book_genre("Мадагаскар", "Мультфильмы") 
+    assert collector.get_books_for_children() == ["Мадагаскар"]
+
+
+
+def test_add_book_in_favorites_adds_once(collector):
+    collector.add_new_book("Гарри Поттер")
+    collector.set_book_genre("Гарри Поттер", "Фантастика")
+    collector.add_book_in_favorites("Гарри Поттер")
+    collector.add_book_in_favorites("Гарри Поттер")  
+    assert collector.favorites == ["Гарри Поттер"]
+
+
+
+def test_delete_book_from_favorites_removes_book(collector):
+    collector.add_new_book("Гарри Поттер")
+    collector.add_book_in_favorites("Гарри Поттер")
+    collector.delete_book_from_favorites("Гарри Поттер")
+    assert "Гарри Поттер" not in collector.favorites
+
+---------
+def test_get_list_of_favorites_books_returns_list(collector):
+    collector.favorites = ["Гарри Поттер"]
+    result = collector.get_list_of_favorites_books()
+    assert isinstance(result, list)
+    assert result == ["Гарри Поттер"]
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