Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Tried and true hidden techniques to get to the truth

This book shows you how to get to the truth using techniques that the subject will not even be aware are being used against them. This book is broken down into 8 basic sections. Each section gets more advanced on methods to get to the truth. After you read this book you will be able to determine if someone is being completely truthful with you in a matter of minutes. You learn how to structure your questions, what body language to look for and audible clues. You learn what is often not spoken is as important as what is spoken. Remember people generally want to be honesty unless they feel justified in their own minds. Its up to you to determine their ulterior motives if you feel they are not being honest with you.