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

This is one of the greatest books ever written. I have been using the methods for 20 years and have bought this book for many people. I recently read Optimal Thinking:--How To Be Your Best Self and I have to tell you that it is the next step past positive thinking. Train your mind with Optimal Thinking and you won't have to settle for second best!