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.
The book didn’t grab me like the first one, but it did pick up. There are a lot of confusing threads that I hope will become clearer in the next book. Things like the relationship with the prince, the dragon, the companion training, etc that some time was spent developing the story then seemingly just dropped.