Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The Best Diet-Fitness Book out there!

This book is the Health Bible for those who wish to lose weight and keep it off. And for those who wish to stimulate their own's bodies' production of the all important Human Growth Hormone by combining exercise and the proper nutrition. One of the most important books I've ever read. Mr. Faigin's research is thorough and the book is well footnoted with the medical references he sites. The downfall of the human diet is historically mapped, starting with the change to grains during the Agricultural Revolution. Degenerative diseases began to afflict mankind at that point, then the diseases made further quantum inroads with the invention of processed foods. This book is a must read. It gets a bit technical with the explanations of the endocrine system and so forth, but this is knowledge that we all should be aware of.