Go to http://www.bigtenbooks.com to find your text books for next semester. It's a website run by students here at Purdue. Basically, you enter the course number, and it will tell you what books you need, and it will show you prices from various online retailers. It also works for students at IU, IUPUI, and the University of Illinois, so pass it on to anyone you know here or at those schools.
Just passing it along since I know there are some people from IU and IUPUI here.
~ Laura M.