Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
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 analyzed reviews to verify trustworthiness.
Read if you're hooked on the series. Unsophisticated writing, no special ideas, pretty ordinary but basically competently done. Would be good value via Kindle Unlimited; much less so for outright purchase.