My all time favorite set of books ever. I love many different books but these will always be my favorite. (I haven't read The Silmarillion yet though. Reading it as soon as I can get my hands on a copy.
Book Nook in a fireplace that is no longer usable. Very creative use of space. Just make sure to clean that fireplace well before putting any books in there and to seal things to prevent water damage or pests from coming down the chimney.