+-------------+
                                    |   Customer  |
                                    +-------------+
                                    | customer_id (PK)
                                    | name
                                    | email
                                    | address
                                    +-------------+
                                            |
                                            |
                                  +---------+---------+
                                  |                   |
                          +-------+-------+   +-------+-------+
                          |     Places    |   |     Book      |
                          |    Order      |   +---------------+
                          +---------------+   | book_id (PK)  |
                          | order_id (PK) |   | title         |
                          | customer_id (FK)|  | author        |
                          | order_date    |   | price         |
                          | status        |   | publication_date|
                          +---------------+   | genre         |
                                              +---------------+
                                                |
                                                |
                                    +-----------+-----------+
                                    |                       |
                            +-------+-------+   +-----------+-------+
                            |   Contains    |   |    Written_by    |
                            +---------------+   +------------------+
                            | order_id (FK) |   | author_id (PK)   |
                            | book_id (FK)  |   | name             |
                            | quantity      |   | country          |
                            +---------------+   +------------------+