Save up to 90% on used textbooks and 40% on new textbooks on Amazon.com. Plus, you'll get up to 70% back if you sell the books back to Amazon. Did you know you can rent textbooks on your Kindle too?!!? Wow, things have improved since I was in college!
While you're on Amazon, be sure to sign up for Prime (for college students) this will land you free 2 day shipping!