iBooks Author: section A section is a part of a chapter. You can
use sections to divide up your chapter. For example, a book
about mammals could have a chapter called “Bears,” which could
contain sections such as “Polar Bears,” “Grizzly Bears,” and so
on. You can also use sections for self-contained content within
a chapter, such as lessons, activities, or case studies.
Sections are numbered independently of chapters. If a chapter
uses sections, you can include standalone pages before the first
section, but not between or after sections. Each template
contains several chapter and section layouts that you can
customize. There are also sections preformatted for copyright,
dedication, and foreword information.