I REALLY like this idea. for the right room ~!~ A DOUBLE-SIDED BOOKCASE as a room divider. Separates the living and dining areas of decorator Alex Papachristidis’s apartment in Manhattan . I could use something like this in a bookcase!
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.