Using an optional A collection of features or functionality that can be enabled on sites. WDS has made several optional modules available to site administrators to enable on their site. For example, the "News" module enables the News content type and provides a News List Block for displaying news on a page. , Page content can be organized into Books. 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.
Contact WDS to have the Book module enabled on your website.