I'm not proposing an alternative mechanism. I think people who can comfortably afford to pay the asked price for a book should of course do just that. On the other hand, for the billions of those who do not have that privilege, I wholeheartedly recommend piracy. It is of no cost to the author/publisher (since they weren't going to pay anyway) and of tremendous positive impact for equality and social mobility for the community. In a perfect world piracy would be an unfair and unnecessary venture. In this one, for many people it is absolutely justified.