This document provides an overview of the book "What Every BODY is Saying" which discusses how to read body language and nonverbal cues. It notes that understanding the biological basis of body language can help understand human thoughts, feelings, and intentions. It also shares that the brain governs every aspect of body language. It then begins to tell a story about a police detective who was able to prevent a robbery by observing three men's suspicious body language and nonverbal behaviors like peeking into a store repeatedly and looking over their shoulders while talking.