Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent book.

This book uses a clear and simple language. Extremely accessible to all the people. In my opinion, all the people who judge themselves knowledge workers would have to read this book carefully.Excellent vision of the differences between consumption and investment, under the individual or social point of view.Together with the new book of Peter Drucker(Management Challenges for the 21st Century), I consider both as being TOOLS for knowledge workers. Although none of them contains formulas for such purpose.