BookMooch

BookMooch is a community for exchanging used books. BookMooch lets you give away books you no longer need in exchange for books you really want.

Give & receive: Every time you give someone a book, you earn a point and can get any book you want from anyone else at BookMooch. Once you've read a book, you can keep it forever or put it back into BookMooch for someone else, as you wish. There is no cost to join or use this web site: your only cost is mailing your books to others.