Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
The book talks about how every axis power country had surrendered and Japan didn't. So the United States told them to surrender or it will get bad. But Japan said no so they dropped the bomb and many people died but Japan said no to surrendering. So the U.S.bombed them again then they surrendered.