To calculate the overall star rating and percentage breakdown by star, we do not 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.
My son wanted this book and I thought I’d save a few pounds buying a second hand copy.. seemed to be a lump of chocolate (or something stuck on the outside pages, that yes could be removed but left a mark , and the cover was damaged.. yes still readable but if you don’t like finding old food stuck to a book , and don’t mind paying probably less for a brand new copy from Tesco’s.. get it at Tesco’s!!!