I love books, but I hate paying for them. I'm an active particpant in www.paperbackswap.com and I love it. Basic theory is that you swap books with other members. If you send a book to someone, you get a credit to receive a book from someone. Head on over to their link for more information.

On that site, I'm also a Box-o-Books member, which means I can swap books directly with other people without using up credits. It rocks and my "to be read" pile keeps growing and growing and growing!