Direct Textbook
Content: Usability:
www.directtextbook.com/ (xhtml-mp)
www.directtextbook.com/ (xhtml-mp)
I wish something like this existed when I was in school! Instead of paying outrageous campus bookstore prices, enter an ISBN to search 200 online bookstores at once. Results are sorted by price from lowest to highest with links to the title on each online bookstore.