Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
I miss them all already! Every time I finish one of the books I have a deep sense of missing everyone of the characters. Book after book I've become so familiar with them all and experienced the growth of each character. Now that's how you write a good story!!! Well done!!!