Save TONS and Rent Your College Books Instead of Purchasing!

If you have a kid in college, or are studying yourself, I'm sure one of the most expensive things to afford are the books!
I have seen the prices of college books, and the amount they want even at the campus book stores, I really don't see how everybody can afford them, and I used to wonder why in the world these weren't covered in with the already crazy high prices for school??
Of course it is a huge money saver if you grab used books, and then you can even sell them after your semester so you can always get some of your money back. But if there was a way to save even more money on your college books each semester, and you wouldn't even have to leave to go pick them up, ( Yeah seriously! Free shipping, always!!)
Campus Book Rentals was started by a college student himself. He thought there had to be a better and much cheaper way to help families with what is one of the most expensive costs needed for college. (next to college tuition itself I guess;)
You can go online, order your books you need, rent them for as long or as short as you like, and get free shipping, to AND from this handy dandy dream come true Campus Book Rental site, and voila! Checkout is a breeze!!
You can find out more in this video:

Another neat point you have to know before you go flying off to rent your lists of college books needed, you are allowed to highlight in your rented book, as if it were your own!! Wow!! (I'm a big highlighter dork, so this is actually one of those selling points that would make me run to my laptop!) They also offer live customer support, Another neat point you have to know before you go flying off to rent your lists of college books needed, you are allowed to highlight in your rented book, as if it were your own!! Wow!! (I'm a big highlighter dork, so this is actually one of those selling points that would make me run to my laptop!)
They also offer live customer support, 30 day risk free returns, the most flexible rental periods, and the nation's largest selection of books!
 You can even earn money simply by referring your friends. (This shouldn't be to super hard!)
 Have you found an cool ways to save on any additional college costs? I would love to hear any advice or tips anybody has on how families can really save on one of the most priciest and most important expenses we will pay for in our lifetimes.