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.
Finally, here we have the last book of the series. I don't think that there is any need to promote or suggest this book to anyone coz if you have already read the previous ones, you must be aware of all the fun and giggles.