Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The China Study is a big part of "Forks Over Knives"

Reading T Colin Campbell's comprehensive review of data collected throughout China was a turning point for me and my husband who suffered his second heart attack about six months ago. Without any support from our cardiologist, we embarked on a diet that Colin Campbell and his cohort Dr. Esselstyn recommends in the 2010 documentary "Forks Over Knives". "The China Study" explains how a whole foods plant-based diet correlates directly with good health. Then it shows how health deteriorates as western processed food is added to the simple diet of Chinese rural people. It is definitely worth reading along with Esselstyn's "Prevent and Reverse Heart Disease".