Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Day-Trading Crooks Exposed

This book is a must for anyone engaged in day-trading who wants to avoid the effects of the chat room snake oil salesmen. Emshwiller has met these people and recounts their strange lives and obscure motivations with a sardonic sense of humor. Along the way, you pick up a healthy skepticism for the ways of internet stock investing.