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.
Another awesome book from Marc Lindsay. The new characters are fantastic and the continued development and growth of existing characters is exciting. The references to real life myths, legends and historical objects is really intriguing and adds depth to a well written story.