All of your 5 star reviews for "Dr Leland Benton", "Dr Noah Pranksky" and "Dr Harry Jay" are obviously bogus. They are read the same, and are all for the same authors who obviously are really one person, or a facade for a few people. Either way, your reviews are transparent and bogus.
Go read the bio's of each author and you will see. One of the books even has Pranksky as the author on the book cover, but further down on the page it has Jay as the author. Which is it? Pranksky or Jay? How obviously fake.
I wouldn't buy one of their books ... and even if it were free, I wouldn't waste the space on my Kindle for one of their books.
And... lastly - Why aren't you an Amazon Verified Purchaser of any of the books you review? Pretty suspicious looking to me.