Instruct: Classify a given Amazon review as either positive or negative.
Query: LIFE SAVER!!!

By far the best and most helpful book relative to baby / kids sleep. It's not a harsh method. He very much make allowences for those of us who have a hard time with crying... At 2 1/2 months (after only 5 days of this method) my son was sleeping a good 6 hours through the night. And it continues to be insightful even now that he's almost 5 (all new sleep issues.)