I wrote a whole post about swapping your bookcases for wall-mounted shelving. Wall-mounted shelving takes up less space, and can almost appear to blend in with the wall. Image from Stadshem, via Freshhome.
9 inspired ways to style your shelves. Built in bookshelves are the latest must-haves in any living space. Avoid home clutter with books paired with artwork and artifacts. Shelves help take advantage of wall space!