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.
This book is really excellent! I salute this series' Author- JeffKinney because its really hard for me to believe how he gets so many ideas for his books to make us readers laugh. In this book Greg is facing problems regarding his brother who bullies him very much.
I really like this book ! I am a big fan of JeffKinney . I ordered this book with few other books and it came the very next day with free delivery. And I am also going to buy the tenth book when its released☺