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.
People like me who are afraid of fire will find this book confronting. The plot is complex and involves many characters, some of whom are added to the list of victims. This is one of the later books in the Adam Dalgliesh series and by this time his character has been well developed.