Duff McDonald is a world renowned author and journalist. He has written articles for Vanity Fair, Air Mail, Wired, New York and published several critically acclaimed books, including New York Times Bestseller, The Firm: The Story of McKinsey and Its Secret Influence on American Business. Up until several years ago, Duff McDonald primarily was a business journalist. However, in his most recent book, Tickled: A Commonsense Guide to the Present Moment, Duff shifts his focus inward. Duff explores society's obsession with the quantification of everything and confronts his own obsession with control. We talk to Duff about his encore in both his career and personal life.