Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book must be banished.

This book really needs to go. Although the techniques in this book do confound the greys and stop their telephathy, they also anger the greys. Their retribution will be extreme. If they can not conduct their (mostly harmless) experiments using peacefull telepathy, they will simply switch to using weapons. Your anti-telepathy hat will simply cause them to shoot you with a tranq. dart instead.At least when they use their telepathy I am able to forget the ordeal. If they stop using their telepathy more people will remember the procedures and be haunted by those memories as nightmares.We must remain ignorant so as not to seem a threat. Seriously do not read this book. This knowlege is dangerous. I, for one, welcome our little grey overlords!