Blending insights from psychology, neuroscience, and cultural studies, this book aims to equip readers with practical tools to interpret body language, facial expressions, eye movements, and gestures, enabling a deeper understanding of unspoken thoughts and emotions. Beginning with the science behind nonverbal cues, the book progresses on to techniques for analyzing micro-expressions, cultural variations, and advanced topics like pupillometry and deception detection. Later chapters emphasize observational skill-building and intuitive perception, supported by real-world applications and hands-on activities. Key features: Integrates scientific research with practical decoding strategies Applies behavioral analysis across business, healthcare, education, and law enforcement Includes cultural case studies and ethical considerations Enhances emotional intelligence and social awareness Offers interactive exercises for skill development.