Maybe at one part of the library the should be for the educating, how-to-books, one for entertaining books such as prosa, storybooks, jokebooks etc and one for history, law-books and so one...
Maybe some books would been wrote in non-common languages as well.
I saw the screenshot of the new client with the new craphics for books(really nice btw) so maybe they are allready planning something like this allready.
