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 has great graphics, but it never got to my Grandson as it fell apart as I was leafing through it when it arrived. No staples holding the pages in, just a thin line of glue at the spine that is not up to the job, will be asking for a refund