Half Price Books is crammed with books, calendars, CDs, DVDs, and computer games. The new books are at least half off the printed price, and you can often find even better deals in their front displays. They have books on pretty much every subject on their two floors. They also have a non-intimidating book buying process: you just leave your books with them, go look around the store for 10 minutes or so, and you come back and they tell you what they can take and how much they can pay you. Granted, they don't often offer very much for your books (10-20% of printed price), but I've found that they often take books that other stores won't touch.