Just out of curiosity why do you want to restrict your library to the contents of a list? I'm curious.
This is when i get that feeling that I've missed something
Having a list of certain books means i dont have to remember/search for those books i can go straight to the list and see my 'interesting' books.
A bit like wandering around a library and picking up those books to take home - because at the moment I'm only interested in those books - not the full library.