Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Eye-Openning!!

This book is so enlightening! I have really enjoyed all of the information. The scientific evidence is well written and explained. As a person interested in science, I appreciated the depth of the information and his explanations on the studies he has done, and the ones he highlights. Truly, this book has changed my way of thinking. Coming into it, I was already a strict vegetarian, and this book solidifies why the vegan lifestyle is the best possible choice from a health perspective. It is not preachy, it simply lays out the health implications of the SAD (Standard American Diet) and allows the reader to draw conclusions as well.