In this revised edition, Paul Ekman, a renowned expert in emotions research and nonverbal communication, presents updated information on his groundbreaking inquiry into lying and methods for uncovering lies. He analyzes a range of deception strategies -- from the political strategies of international public figures, such as Adolf Hitler and Richard Nixon, to the deceitful behavior of private individuals, such as adulterers or petty criminals -- and explains how a successful liar most often depends on a willfully innocent dupe. Ekman describes how lies vary in form and can differ from other types of misinformation; how interviewers should probe for more information that can reveal untruths; and how a person's body language, voice, and facial expressions can give away a lie but still fool professional lie hunters like judges, police officers, drug enforcement agents, Secret Service agents, and others.