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.
My son is in love with National Geographic books. He loved this book and we added it to his collection. Great pictures, right on Target for reading level and happy to have reading material to fill his mind and time.