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 am not usually a fan of the short story form, however, this collection is a superior example. The collection basically examines each of the characters of the novels and it weaves a connected narrative that any fan of the novels will enjoy.
I'm really liking the series. Neatly written, good characters, interesting plot twists and I really like the zombie combinations that the necromancers come up with (Roger the hydra-shark-drake is my favourite so far)