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 bought this for my kids to add some more diversity in to their book collection and I can't be sure which part of the story it is they love, but all three of them (4, 5 and 7 years) LOVE this book and we read so often, even after having it a year! And it's a great one to open up a number of interesting conversations about various social issues.