Chegg.com
I should have mentioned this earlier for all the college students that visit here, but it completely slipped my mind. A coworker of mine alerted me to this very fine site, Chegg, where you can rent your textbooks. Not only is it very cheap — I bought mine for more than 50% off — but it’s green, too! By buying less books you’ll be saving trees; and for every book that’s rented, Chegg plants a tree.