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 analyzes reviews to verify trustworthiness.
I read this book on my kindle and would rate it a three because it didn't really tell me how judy saved the world. It also wasn't one of Megan McDonald's best judy moody book... so i rate it a three :)