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.
I asked for books for an 8 yr. girl going into grade 3. She was very disappointed when the first page only had one sentence. She has never mentioned how the book went. Maybe it was too easy for her. I will talk to her and pick out others more appropriate