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.
Kindle NEEDS to mark their books, "READ TO ME & INTERACTIVE BOOKS", my granddaughter is handicapped, these are the kind of books I'm looking for and when I tried CALLING Kindle to find out HOW I can tell, they disconnected ME! ugh