When you select a Reference Manual book from an AnswerBook2 library page, you see something that looks similar to a book's table of contents, but with two major differences:
No expand or collapse icons -- Because of the specific nature of a man page table of contents, it shows all man pages within the book and does not allow you to expand it or collapse it.
An alphabetical "jump table" -- Use this table to jump directly to a list of man pages that begin with the selected letter.