Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Clever book

This author is clever. He is spreading the word about natural health like wildfire. This is so needed. Is this the best book I have ever read? No, but you can see he has 20 years of personal experiences and he references tons of books so you know he did his own research. He has hob knobbed with the big boys who are causing all the trouble with their greed in this country. He does have a lot of first hand knowledge. He puts himself on the line to expose big crimes to the people of this country. Great book, well worth reading.