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 SparkNotes book because I absolutely loved the story "Lord of the Flies". I was thrilled to find this book at just $4.00 (though it was used). There are some signs of previous ownership (creased binding, dog-eared pages, etc.) but I'm so glad I bought it!