In a city (and area) where nothing is cheap, Capitol Hill books offers something for free. Although this dealer of used, rare, and signed books is not necessarily a bargain INSIDE the store, they do put out a box (or two or three) of free books almost daily. No strings attached. True, most of the books and magazines are things most people would never think twice (or once) about reading, but occasionally, a treasure does come up. Surprise yourself.