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 analyzes reviews to verify trustworthiness.
The 2 star rating is for the price! This book has 123 pages, 23 of which are references. This book is worth about $10, in my opinion. But $40?! No! I should have read the description a bit closer. I haven’t started reading the book yet, but am sure it’ll be helpful, as are all of Stephen Stahl’s books. It shouldn’t cost an arm and a leg though.