Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I am not a believer.

I tried to follow the diet prescribed in this book for my blood type, thinking it will make me feel better and that I will lose weight. I did neither. Also, the were so many foods to "avoid" that I felt like I would have been better served by a "fasting" diet. Check the book out at the library and see if it works before investing money. It may not be worth it.