To calculate the overall star rating and percentage breakdown by star, we do not 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 learned my lesson and will always look at the inside of the book before buying. The print in this book is light brown. If you are over 40 it is going to be hard on your eyes. While it looks interesting. I am returning this book because it is not printed in black.