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.
It was a good book it is also my first FAMOUS FIVE book. It showed that the five went to camp and a boy called Jock was supplying food. And they discovered that some Spook train was there and Jock had a stepfather who told them not to go to close to the spook trains. It is a GOOD book.