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.
READ THIS BOOK BEFORE GIVING IT TO A KID. I love all of the books and characters in this series. I had pre-ordered this book months ago and it came the other day. Obviously, they couldn't have known we'd be in the midst of a pandemic when this was written, but there is a 6 year old character in the book that died from the 1918 flu pandemic. I wished I had known before I gave the book to my child to read right now.