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 kid borrowed The Cardboard Kingdom #1 from school library, and ask one as a gift for Christmas. He loves this book so much. I noticed there is Cardboard Kingdom #2, then I bought it too. Those are his favorite book now