I will show you how to create a book with Drupal 7 and how to associate it with your content types
To create a book you need to create a Book page, let's say that this is the page that will hold the index content of your book
- content >> add content >> book page (node/add/book)
- Book outline >> create a new book
- Then go to: /content/book/settings to associate the created books with your content type
- When you create new content all you have to do is choose your book.