Website: www.campusbooks.com 

Claiming to have "nearly every textbook available for rent," Campus Books stores over 8 million college books and snatches prices for new, used, rental, and e-books from over 40 online textbook vendors. One of the site's biggest highlights is that it offers insurance (for a fee) to cover any damage, loss, or theft accidents. You can even look for deals on the go with the free iPhone and Android smartphone app. Students can also take advantage of free shipping, as well as the company's 15-day grace period and 30-day return window.