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 ordered this for a friends kindle. She must have liked it as she is an avid reader and I've not heard otherwise. There are many kindle free editions of books and its nice, in this economy, to have access to reading material that is free. Thanks, Amazon, for this service..