CHARLES DUHIGG is an investigative reporter for The New York Times. He is a winner of the George Polk and National Academies of Science awards, and was part of a team of finalists for the 2009 Pulitzer Prize. He is a frequent contributor to NPR, This American Life, and Frontline. A gradaute of Harvard Business School and Yale College, he lives in Brooklyn with his wife and their two children. From the Hardcover edition.