Tenzin Gyatzo, the Fourteenth Dalai Lama, is the temporal and spiritual leader of Tibetan Buddhism and the head of the Tibetan government in exile. The author of The Art of Happiness, among other books, he resides in Dharamsala, India. Paul Ekman is the world's foremost expert on facial expressions, a professor emeritus at the University of California in San Francisco, and the author of Emotions Revealed. He has served as an adviser to police departments, antiterrorism groups, and animation studios, and Ekman's research inspired Lie to Me, the FOX TV series. He lives in northern California.