I would go on the Amazon guidelines and specifically look to see if it violates any one of them. If it does, it would be reasonable to report it. Amazon should have a certain level of quality on their site.
If it doesn't, I would just let your review do it's work. Don't reply to the author. If you get into a public internet fight with him, it will just increase his sales.
If it doesn't, I would just let your review do it's work. Don't reply to the author. If you get into a public internet fight with him, it will just increase his sales.