Now in Calibre when you highlight a book and "drop down" reading list you can add that book to a default list. When you "View" the list Calibre NOW highlights the books green and bunches them all together. In an earlier version about a year old, when you viewed the default list, that list appeared as a seperate "library" of just those books in that list. This allowed easy creation of book list catalogues to install on the kindle.
What I would like Calibre to do is allow the creation of "sub" libraries that can contain, History, Sci Fi, Biographies or any other topic or grouping that I can create, etc. Or maybe I can do that but I just don't know how.