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.
What an interesting book this was. I have longed for an insight into Ginger's war years and this was a corker. Enter the horrible controller who pulls her back into service. Basil discovers (too late? ) that Ginger( is still and ) was a spy. I love the way the characters grow and change. I am looking forward to the next Ginger story very much.