About the Author
CHRISTOPHER HADNAGY is author of the best-selling book, Social Engineering: The Art of Human Hacking and professional social engineer who works with Fortune 500 companies.
DR. PAUL EKMAN, PH.D., is the world’s foremost expert on facial expressions and professor emeritus of psychology at the University of California San Francisco School of Medicine. Dr. Ekman’s pioneering work in the field of nonverbal communication and visual lie detection was the inspiration behind the hit TV series Lie to Me, for which he acted as a scientific consultant. Dr. Ekman has also served as an advisor to police departments and anti-terrorism groups within the United States government, and is the author 13 books, including Telling Lies and Emotions Revealed.