diff --git a/openbookr/ABC.py b/openbookr/ABC.py
index 6d065df..f56c462 100644
--- a/openbookr/ABC.py
+++ b/openbookr/ABC.py
@@ -6,6 +6,7 @@
 
 from abc import ABC, abstractmethod
 from openbookr.models import Book
+from collections.abc import Iterable
 
 
 class BookCreator(ABC):
@@ -21,3 +22,137 @@ class BookCreator(ABC):
 
     def __book__(self) -> Book:
         return self.book
+
+
+class IDataBase(ABC):
+    """
+    DataBase Interface
+    """
+
+    @abstractmethod
+    async def add_book(self, book: Book) -> None:
+        """
+        Add book to database
+
+        :param book: Book model
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def get_book(self, book_id: int) -> Book:
+        """
+        Returns book from database by id
+
+        :param book_id: Book table primary id
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def del_book(self, book_id: int) -> None:
+        """
+        Removes book from database by id
+
+        :param book_id: Book table primary id
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def update_book(self, book_id: int, updated_book: Book) -> None:
+        """
+        Replace already existing book in database
+
+        :param book_id: Book table primary id
+        :param updated_book: New book model
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def book_list(
+        self,
+        author: str | None = None,
+        tags: Iterable | str | None = None,
+        genres: Iterable | str | None = None,
+    ) -> Iterable:
+        """
+        Returns all book list or book list by filters
+
+        :param author: Author filter
+        :param tags: Tags filter
+        :param genres: Genre filter
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def add_genre(self, genre: str) -> None:
+        """
+        Add genre to database
+
+        :param genre: Genre name
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def add_tag(self, tag: str) -> None:
+        """
+        Add tag to database
+
+        :param tag: Tag name
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def del_genre(self, genre_id: int) -> None:
+        """
+        Removes genre from database
+
+        :param genre_id: Genre table primary id
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def del_tag(self, tag_id: int) -> None:
+        """
+        Removes tag from database
+
+        :param tag_id: Tag table primary id
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def add_author(self, author: str) -> None:
+        """
+        Add author to database
+
+        :param author: Author name
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def del_author(self, author_id: int) -> None:
+        """
+        Removes author from database
+
+        :param author_id: Author table primary id
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def authors(self) -> Iterable:
+        """
+        Returns authors list
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def genres(self) -> Iterable:
+        """
+        Returns genres list
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    async def tags(self) -> Iterable:
+        """
+        Returns tags list
+        """
+        raise NotImplementedError