Templating: template key "panel" in chapter_template.php
- in Menu Manager: the only caption can be set, it always displayed all chapters with template panel
- as a shortcode: - parameter book is available, so you can display only chapters/pages from one book, but again, chapters have to have template "panel"
It has no logic... not mention you need to know book ID . And there is hardcoded 24 items limit.
You can display only chapter shortcodes. No page/menus list.
Next notice: as soon as you use panel template for book, this menu will fail.