Paul Babiak, Ph.D., is an industrial and organizational psychologist and president of HRBackOffice, an executive coaching and consulting firm specializing in management development and succession planning. His work has been featured in the New York Times, Washington Post, Harvard Business Review, and Fast Company. He lives in Dutchess County, New York, with his wife. Robert D. Hare, Ph.D., is the author of Without Conscience and the creator of the standard tool for diagnosing psychopathy. He is an emeritus professor of psychology at the University of British Columbia, and president of Darkstone Research Group, a forensic research and consulting firm. He has won numerous awards for his research, lectures widely on psychopathy, and consults with law enforcement organizations, including the FBI. He lives in Vancouver, British Columbia, with his wife.