Administrators can view a list of all books on the <a href="@admin-node-book">book administration page</a>.  In this list there is a link to an outline page for each book, from which is it possible to change the titles of sections, or to change their weight, thus reordering sections. From this administrative interface, it is also possible to determine whether there are any orphan pages - pages that have become disconnected from the rest of the book structure.