It is not just the students that are pissed off. Walter Rudin wrote the classic book in advanced calculus, and when the publishers started playing games and jac

It is not just the students that are pissed off. Walter Rudin wrote the classic book in advanced calculus, and when the publishers started playing games and jacking up the price, he fought them long and hard, and (as I recall) at considerable expense to himself. And having taught calculus out of the umpteenth edition of one of these books -- they often introduce mistakes! I taught out of the eighth edition of a mainstream calculus book and they got the statement of Taylor's Theorem (which is a big theorem) WRONG. I think it could not be more obvious that all these revisions are useless to students and teachers.