Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great, Timely Book

Meredith Maran is no ivory-tower expert on teenage trouble and drug use. She's been there with her own son, and exeperienced the emotional turmoil every parent feels when an adolescent seems to be careening out of control. But Maran survived, and so did her son. His survival and maturation into a fine young man gave her the strength to become a fly on the wall following three kids--and their parents, friends, and counselors--through the maze of drug rehabilitation programs. Along the way, Maran provides insights every parent of a teenager needs to know. Dirty is a book from the heart by an author with a sharp mind, a keen eye, and a big heart.