eTextbooks for the iPad 1.0
the author of this app says:
College students at nearly 7,000 campuses in the U.S. and Canada use eTextbooks from CourseSmart to help achieve their education goals. Students can access their eTextbooks and notes using any computer or mobile device connected to the Internet, including with their iPhone, iPod touch and now, iPad. The eTextbooks for the iPad app is a perfect complement to a CourseSmart eTextbook subscription. Students can benefit from the advantages of mobile learning--leaving their backpacks and laptops behind.
Requires iPhone OS 3.2 or later. Application is free, content available via subscription which is not free.