Default book collections.
In your sales and product upgrade web pages, the books are listed in collections. The default setting is nothing.
(1) There should be a standard collection for each of the products (Silver, Gold, etc). - a Default setting that is customizable.
(2) There should be authorial based collections as a default also.
(3) There should also be a setting where you can see which books are not in a collection. This way you can verify you have categorized / grouped each book.