Bests & Worsts Reviews from Amazon

As usual, most of the 5 star reviews are from family and friends of the author. How do I know? Because almost all of the things that the author is recommending, turn out to be HIS OWN PRODUCTS. I purchased the book looking for specifics on how to sell and market my ebook. There is some good info here and there, but most of his tips end with, "for more information on how to do this, visit blahblahblah.com" which ends up being one of HIS websites (which, yes, you have to PAY for). How can you trust someone who already took your money and is also trying to load you up with back-end offers in the actual book? Isn't that the reason you purchased it already?? To avoid the BS?? Avoid this one on principle