A built-in doesn't require a forgotten crevice or drywall-busting construction. Even an expanse of wall presents an opportunity for adding storage. Here, Inglewood, California, contractor Tim Peterson wrapped deep bookshelves around an antique desk to create a niche, rather than to fill one. The desk would have looked lost on an empty wall. So he turned a decorating challenge into a functional focal point while carving out a small home office within the den. For the bookcases, Peterson installed adjustable shelves for storing items of various heights. To eke out every inch of depth, the bookcases' back panels are left off. By securing the units to hanging strips just below their tops, they sit flush with the wall.