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 Jason Reynolds series is entertaining and engaging for young readers. My son said it was one of the best books he has ever read when he finished, Ghost. He has now read three of the books and likes how they are all connected.