This statement is (obviously) false as 99.9+% of all books sold on Amazon are authentic. Yes, Amazon should do even more to combat counterfeit everything but inflammatory, false comments are not productive.
The first book on that list has comments showing off the counterfeit book that the people have gotten!
Reviews on Clean code: This books is a fake. Don't buy it. Look at the images I posted.
Reviews On Mythical Man: ordered new book, got something that was used and marked up and Great book, terrible terrible print and binding quality (which I assume is just a counterfeit)
Reviews On Algorithms: Beware of counterfeits; do not buy from Amazon!
I'm not going through the entire list, but most of the tech books are all fakes.