Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The best book on volatility ever written!

I am a futures trader/ stock investor/ produce distributor. My constant involvement in markets of one kind or another led me to develop a deep desire to understand volatility. Unfortunately the only books I could find dealt with option volatility. "Market Volatility" has been THE best book dealing with market mechanics that I have ever read. I recommend the book as a "must have" to my friends in the industry.