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.
It is a wunnerful book. People say that children are addicted to mobiles but i am addicted to this book. It is really clever of the author to write this book.I am always telling my mummy to send me to a school like st clare and malory towers.I will miss kee-ty very much. Now let me buy the next series!