Book - Category - Menu

For content management, we can use Book, Taxonomy category & Menu

Taxonomy ~ to class node into category

Book ~ A book is a set of pages tied together in a hierarchical sequence, perhaps with chapters, sections, and subsections. You can use books for manuals, site resource guides, Frequently Asked Questions (FAQs), or curricula. Any content type can be added to a book, and a book can contain nodes of more than one content type.

Menu ~ When we create menu link, we have 2 option:

1. Give the taxonomy link eg: /about us
2. Give the book link eg: about us 

If we give taxonomy link for menu, then when we click the menu - the display are the title & summary of the child menu (display all node under the category)

But, if we give the book link in menu - when we click any menu - the display are only title (display all node under book)

Step:

1. Create taxonomy category
2. Create Book (main book to contain other node)
3. Create Menu - link to book node (main book)
4. When we create new content - specify the Category & Book