One of the city's best used-book stores (there are also plenty of new tomes in the front room), this is the ideal haunt for the kind of serious browsing where you forget what time it is. You'll find good literature and sci-fi sections, as well as a travel area at the back for planning your next big trip.
It also buys used books so if you happen to be traveling with your personal library in several steamer trunks, this is the place to offload it and cash it in for dinner. If they don't buy, just hang around the stacks for a few more hours looking morose.