I can't tell you how much I LOVE paperbackswap.com! I was all about some book swaps, but then I found this on Crystal's website one day and it was love at first sight! All you have to do is post 10 books that you are willing to swap and you instantly get 2 credits. Each credit allows you to look through their vast inventory (made up of everyone else's posts) and pick books. They have hardcover, paperback, mass market paperback, audio cassettes, audio cd's...you name it. For every book that you send off to other people, you receive another credit. Very inexpensive way to read books if you don't have time to go to the library. Check it out!