Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not realistic

What woman finds a man who doesn't use toothpaste, deoderant, or clean underwear, and never changes clothes attractive? Maybe a cave woman. I couldn't enjoy the book thinking of the poor people in a car or on a plane with the reeking Jack. The ending with him, of course, with a single crashing blow breaking the neck of the killer and the F.B.I. saying "now we own you", well this part wasn't even a one star. The book had a lot of potential, but was disappointing.