Books rearranging

OEHive has several ways to organize and navigate content - one of them is "books". See the list of books. Technical definition: a book is a book-page that has no parent-page. Because of this definitions there are currently many independent single-page books, simply because they are not outlined correctly. This clutters the list of books horribly, and I believe the book list will gain value when small books are organized into larger books. For reference it may be interesting to look at the book-list at Drupal.org, a site with hundreds of thousands nodes and only 12 books.