I pray that the quality of textbooks won't go down if they're reduced to free. I know the textbook industry is a racket but I don't know many PH.D.'s who expect

I pray that the quality of textbooks won't go down if they're reduced to free. I know the textbook industry is a racket but I don't know many PH.D.'s who expect to work for free. What if textbooks end up being funded by agenda-pushing corporate advertising?