Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Strategic Negotiation

"Mr. Hansen's knowledge of negotiation is incredible. As a salesperson who negotiates complicated contracts, I ordered this book hoping to pick up a few pointers. I was shocked at how little I actually knew about negotiation. I learned more in the first section of this book than any negotiation training I've taken. Seriously. I could not put this book down. His historical examples are not only entertaining, they illustrate his points. If you want to give your negotiation skills a major boost, I recommend this book."