This book is all about weight loss. It discusses methods such as fasting and ketogenic ways of losing fat in our body. It also provides some history and common knowledge on problems people have that face dieting and what is now called “crash dieting.” I found that particular part of the book to be very interesting, as I know it to be true. There are parts where you feel that the book is losing track on the main topic, but the author quickly returns to the main issue. I think this book would be useful for people that wish to have general knowledge on weight loss.