$this->db->beginTransaction();
        try
        {
            $this->db->query("SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED");

            $sth = $this->db->prepare("INSERT INTO books(title, categoryID, publisherID, date, description, price, image)
                                   VALUES (:title, :categoryID, :publisherID, :date, :description, :price, :image)");
            $sth->execute(array(
                ':title' => $title,
                ':categoryID' => $categoryID,
                ':publisherID' => $publisherID,
                ':date' => $date,
                ':description' => $description,
                ':price' => $price,
                ':image' => $image_path
            ));

            $bookID = $this->db->prepare("SELECT bookID FROM books WHERE title = :title");
            $bookID->execute(array(
                ':title' => $title,
            ));
            $row=$bookID->fetch();
            $book = intval($row[0]);

            $sth = $this->db->prepare("INSERT INTO books_authors(bookID,authorID)
                                   VALUES (:bookID, :authorID)");
            $sth->execute(array(
                ':bookID' => $book,
                ':authorID' => $authorID
            ));

            $this->db->commit();
        }
        catch (PDOException $e)
        {
            $this->db->rollback();
        }