I post in hacker news because it is a place with people interested in the subject, sorry. Moreover, the links are quite clearly marked as buy on Amazon link. If you don't want to buy that book, you don't click on the link. If you found the review of a book interested, you keep reading, if you don't, you close the tab and keep on browsing. It's not like I'm putting a name and linking to another place.

The link got a few votes (thanks everyone who read and liked), so I guess I was right in posting it here.