The following sites may just come in handy. Be advised, however, that we do not in any way claim that these links will always provide cheaper options. We are not responsible for books ordered that are delayed, or assignments missed. This is a great link to start with. It rates other sites that sell text books on-line.
Links are available on the page as well.
Be sure to scroll down and look at the handy chart near the bottom of this site. I think they have a sweepstakes to win a certificate for free books, for a limited time only. It's also a good bet. They are offering free shipping wit the purchase of two or more books. This site is quite well laid out.