To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
The book content is very good. Quality of the book is also good. But actual price mentioned is not 690. I have put the pic which clearly show its price is Rs 450. The isbn number is also different. The actual product we were expecting was a lady bound book. But we got a soft bound book.