Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ultra-Powerful Self-Help Book, Sutphen's Best Work

Dick Sutphen's nearly 20 years of research and study of human potential led to this ultra-powerful book that is a quick read. One of the few books that is so full of profound observations it holds up well after several re-readings. Sutphen has a talent for using few words to transmit life-changing messages of overcoming our individual blocks to happiness and fulfillment. All this and a bargain price to boot!