Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
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 analyzed reviews to verify trustworthiness.
My 7 year old grandson loves these books...you can buy them individually or in set. There are 32 total. Hours and hours of reading that holds his interest with stories of dinosaurs, sports and history. The stories involve a brother and sister that travel through time. Excellent gift!