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.
My rating is not based on the content of the material. I cannot attest to that as I have no way of opening the book. I did purchase the ebook version of this title. The book would not open in the newest and most expensive Kindle model (Oasis). The book would not download within the kindle app on my phone (not a network issue; I downloaded the other book I purchased at the same time that I attempted this download. The second book downloaded perfectly fine. So it is an ebook, sold by Amazon, that will not open in their device nor from within their software.
I do plan on purchasing the hard copy of this book and will update this review to include the content at a later time.