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 analyzes reviews to verify trustworthiness.
I guess it is a good book. My granddaughter got it from the library. I washed her school bag without checking all the pockets. Oh yes I did! So I bought a new book for the school library. As t least it's new :)