E textbooks aren’t cheap either. They are normally the price of a used textbook and are just PDF copies viewed on a computer screen. Kindles and Nooks are not going to be the platform for E textbooks. IPads and other tablet apps may.
I see that. Once, the college bookstore didn’t stock a biology text but I was able to use my mother’s who had taken that class 30 years before. Same book except the picture quality had improved. Can’t do that now days.