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 found this book seems to tell you all the right things but lacks substance. It comes across with a lot of good ideas but very basic and not much in the way of HOW to do the things it suggests. Kind of like a healthy eating book that tells you to eat less and exercise more. But a good starting point if you really have NO idea how to be assertive.