PaperBackSwap.com: The success of this site has allowed it to move beyond allowing members to swap paperback books to categories of hard backs, audio books and more. List your books, wait for someone who wants one and send it. For every book you send someone you can choose a book to be sent to you from the site's library of nearly 5 million titles. The books you receive are free, you pay for mailing the ones you give to a member. Visit http://www.paperbackswap.com or call 678-802-1922.