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.
I use this book as a Bible. Totaly changed my mind about how I looked upon the money matters. Today around 5 years after I bought this book I can sincerely write that I have attained almost every thing materialisic of I had ever dreamed of. Amazing book to help ppl who want to build wealth from scratch. God bless Mr. T Harveker