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 often said that self analysis & self critique is the best analysis and this suits very much to the present work where a Bengali author looks deep into the Bengali culture and moorings with critical eyes in the backdrop of tremendous knowledge about the specific culture finely mixed with long experience. A wonderful book with a very interesting presentation. If somebody wants to look closely at Bengali culture, this book appears mandatory.