My own viewpoint goes like this. *IF* one ever chooses to implement the Book with Link feature, it should operate as follows:
Create a topic that is used to briefly describe the section the Book is about. Inside this topic, create links to the pages inside the book. One way I like to automate this is by using SeeAlso keywords and SeeAlso controls to sort of automate the process. That way I create the topic page once and forget it exists. I simply make sure I remember to associate any new topic page with the proper SeeAlso keyword.
Helpful and Handy Links
It's kind of sounding like something we shouldn't be doing. I guess if people are used to Winhelp, which rarely has linked books, then the same would be true for webhelp.