Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Beware of offensive language

The author, Jack Gantos, relates how, as a young adult, he became a drug user and smuggler. He was arrested, did time in prison, and eventually got out and went to college, all the while hoping to become a writer.Throughout the book the words "pissed" and "ass" are used with some frequency, and the author talks openly about his use of drugs. The "F" word is used as well and some descriptions constitute this book as for mature readers only. Interesting, but not appropriate for a middle school.