I love a room with books, I tend to like bookcases that are built in or go full height from floor to ceiling. Bookcases can provide a lot of storage to a room too. Another great aspect is that books can add so much colour to a room. Here are a few that show the pop of colour and personality the books add to a room. Whether it's a more formal living room like this.
Or, a more casual look – here they've used large artwork to hide 2 areas in the bookcase, if you want to keep less 'pretty' items behind here.
Or even in a small space – here they have a curtain that can be closed across the wall to create a whole new look.
Image (top image): Deb Nelson Design, image 2, 3, 4: Domino magazine