Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness.
The hardcover edition delivered to me by Kone books seems fake! The paper quality is extremely cheap and all the photos and words are blurry. There is no printed price on the back!! I need help to verify this product