Daniel J. Siegel, M.D., is a clinical professor of psychiatry at the UCLA School of Medicine and a Harvard Medical School graduate whose books include multiple New York Times bestsellers. Tina Payne Bryson, Ph.D., is the founder and executive director of the Center for Connection in Pasadena, California. Together, they co-authored the New York Times bestsellers The Whole-Brain Child and No-Drama Discipline, translated into over twenty languages.