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 have thoroughly enjoyed every book I have bought from T. Kingfisher. While short, the immediate world of our hero, young Oliver and his armadillo familiar are brought to life in gritty detail. His adventures and problem solving as he winds his way to the mountains to fetch the rain clouds for the village keeps the reader engaged.