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.
This author had such an involved plot, with a large variety of suspects and others closely involved, that I frequently had to reverse my Kindle to re-read a chapter. Several times I determined to abandon the book but forced myself to persevere because I have never given up before. I still don't really know what happened in the story - and sadly I don't care.