Text books

I am taking Biology and a couple other classes at Rio Salado.. where can I find these text book used? They don't seem to be available anywhere but the bookstore!

I have found books before on amazon, just look up the ISBN #

And as the other person said, search the ISBN numbers, you can often find them on Amazon and such.

I'm taking soc thru rio & I rented mine from amazon for $25. It's due back in october well after my class ends.

How where the classes at rio? I googled it and the reviews weren't so good

I took three 8 week classes this summer. The Soc 101 Psy 350 were great! The Bio 156 was awful, way to much work that didnt help you pass the final at all. When I asked what was needed to study I was told the whole book, all lesson and online resources could be on it. The exams were do detailed with no direction given. I'm at PCC for 201 online and doing 205 in person.