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.
Harper is right on the money. This is a well thought out plot that keeps you engaged throughout. It tells the story through two time periods blending fact with fiction, family obligations and secrets with the race to fond the ultimate weapons from a time before man. Great read