Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Helpful Guide to Men's Health

I got the book to restore peace to my health club workouts. As my friends have turned 50, many have been asking "Dr. Joel" about prostate cancer. I'd be glad to answer, but it's not exactly my end of the body, since I'm a dentist. I read the two chapters on prostate cancer, but then I went back to read the rest of the book. I don't want to be an instant expert, but I now have a quick answer to all of the questions: read The Harvard Medical School Guide to Men's Health for yourself. It's really an excellent book.