Free Textbooks

Here is a company "Flatworld" that gives away the electronic version of their textbook away for free. They charge $25 for a printed and bound version of the book mailed to the student. They will let you cusomize the textbook. They will let you (I quote) "Change the order of chapters or sections - or delete them altogether. You can add large chunks of information like a case study or an exercise set." "...and actually make changes at the sentence level."

Here is another site with lots of good links to cut textbook prices.