Book sites

All right, everyone knows about amazon...and, I found Time Warner Bookmark today. What I would like to do is compile a list of links for sites where folks can either search for a book to read when it's their month, or buy new and used books. So, list the sites that you guys use. Even if you aren't planning to participate in the book club, but, you know of a good site, please share the link!

Amazon

http://www.amazon.com/gp/homepage.ht...829550-6801412

QPB (Quality Paperback Book)

http://www.qpb.com/doc/login/club_me...requestid=1562

Time Warner Bookmark

http://www.twbookmark.com/index.html