Yeah, the $20-to-print requirement will get tricky. Imagine a biology textbook with detailed color pictures. Do you have to remove some because color printing i

Yeah, the $20-to-print requirement will get tricky. Imagine a biology textbook with detailed color pictures. Do you have to remove some because color printing is expensive? Is it acceptable if you can print a text-only version of the book for $20 and look at the pictures online? Is it acceptable to sell a supplementary illustrations book? The real win here is for students to be able to download the whole book for free. In principle, your entire textbook budget for college could be the price of an e-book reader.