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.
unfortunately, this was not the item I had purchased. I received an older version with completely different page references to others in my class. This was extremely irritating and unhelpful during my exam! However, this was two years ago, so not bothered now!
It's great ordering a book, and the book was good, but the delivery took so long that I had to go to the bookstore and get it for my daughters class anyway, so it was really a waste. Shouldn't take over two weeks to get a book.