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 excellent book in this author's repertoire and is a total departure from previous novels. The author's take on a crime suspense theme was all embracing and kept me guessing. The ending of the book was enjoyable and one could rest assured that the character's lives were blessed with a conclusive outcome. One of her best.