I love using my iPad for textbooks but had just come across one major drawback. The professor was conducting a open book test and would only allow the use of paper textbooks no electronic devices were permitted during the test.
Cheap-Textbooks.com was started in 1999 as a tool to help me find the cheapest textbook prices onine. It originally was a desktop widget and was moved to a website to share with other students. I like finding the cheapest textbooks and hope it helps you find the cheapest textbooks also.