The Book Rack has a heck of a lot of used paperbacks, but almost all of them are romance novels. They do have a small sci- fi, classics, and mystery sections, but they are dwarfed by the huge walls of romance. If you are a fan of romance novels you would probably be in heaven with the huge choice. You are able to trade your old paperbacks in as well, but you can only pay for half of your current bill with credits from the paperbacks you sold to them. . .and they don't give cash for the books. It is a good concept, but Half Price Books does it so much better.