You can use this Slugbooks tool to find the best prices on all your textbooks. I’ve found that this widget tends to be a lot easier to use than other tools because it doesn’t require you to find the ISBN numbers for all your books – all you have to do is search for your classes and it’ll find the books you need.

Remember that this tool simply looks up the prices at each respective site – if you have any problems actually buying a book, you’ll need to contact the seller.