Ask YC: Feedback on my startup

Please take a look at my startup from two different angles: 1. You're a college student who has just been told to go to cocunderground.com for your textbooks. COC is the name of your college (College of the Canyons is the school's actual name). You have no other information. (I want to simulate a potential user's actual experience. Feel free to register too! Just put YC at the beginning of your name or username and I'll remove you after a week.)

2. You're yourself and evaluating the site's concept, navigation, ease of use, aesthetics, everything.

Let me know what you think. Thanks!