"The rising cost of textbooks—along with the rise of easy-to-use publishing tools online—has helped drive the popularity of open-source materials
and professors’ taking a do-it-yourself approach to textbook
publishing. Here are three professors who wrote their own textbooks and
are distributing them free."
Now how come I never had a professor like that? My books were generally $50 to $100, and at the end of the semester I could sell them for maybe $10 to $20. What a ripoff. But these professors have seen the plight of their students and are trying to help where the universities themselves are not.
Here's a nice person who has made a list of university classes you can take for free.
So, as tuition costs increase beyond the reach of most people, some are fighting back.