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.
Being a huge fan of the author and lapping up her books so far - this one was a bit hohum - it wasn't until I got half way through that i really wanted to continue reading. The end is sweet though and worth battling it out for ;)