Book Contents refers to a hierarchical list used to build the structure and content of your book.
The Book Contents toolbar consists of a set of tools that allow you to add objects such as title page, table of contents, table of figures, file, topic, glossary, and index to your book, as well as changing the hierarchy of your content.
Access the Book Contents tab when you open a book in the Editor, or through the Book Contents tab on the Properties window for a book object.
