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.
A truly amazing real life story, this book kept me enthralled from start to finish. McMillan's adventures in this book far outweigh anything I have read before. I particularly liked his outlandish experiences in Afghanistan, relentlessly pursued through various countries with many betrayals along the way. It is so good that McMillan is a survivor and able to entertain us with this book. I thoroughly recommend it.