Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A very practical overview of how to communicate for win/win

Although this book is 10 years old, it remains very "current" and powerful. Communicating is the essence of what people do, and so often failure of good communications inhibits and injures. The book offers a great insight and practical approaches to improving communications and negotiating for positive outcomes. A "must" for anyone, but especially for people whose work involves communicating with others (most of us).