> You can buy it at Amazon [5] for $97.40, a bit less for a used copy.
People would still pirate it if it cost $0.97, but why are you even pursuing that kind of exorbitant pricing? If it was your publisher that made that price, why personally complain if you don't agree? If I'm an educator, my calling is to teach. It isn't to make exorbitant amounts of money from my words, it is for my words to reach as many people as they can and maybe help someone.
He has a (I imagine) highly well-paid job and could get an even more financially rewarding one anytime he wants in an industry that'd be pining to hire him. If this was his publisher making the post I'd understand. But personally complaining about how someone in Indonesia is stealing your overpriced textbook to try to pass on that intellectual knowledge to others who are (most likely) less privileged is just impossible to sympathize with.
Were they misrepresenting his work or something similar? If it's that I can understand protecting your IP. If it's merely redistributing it then no, I can't.
I'm biased because I don't agree with nearly any part of Intellectual Property, but my problem here isn't ideological, just material: pricing it out of reach for 80% of the world's population and then complaining when people want access to it.