I often to go amazon to read reviews of books I'm interested in. But, many people are skeptical of amazon reviews especially the good ones because there's supposedly a practice of authors giving good reviews for one another's books and also people being hired to give good reviews. There's also speculation of the reversed where rivals give very negative reviews to other.
So, how much to do believe in amazon reviews? Do you believe the one star review more or the 5 stars or you choose the 3 stars one?