He is the author of four acclaimed works of narrative nonfiction: The Agitator (PublicAffairs, 2019), a portrait of prophetic resistance during the age of Hitler; Double Agent (Scribner, 2014), named by The Wall Street Journal as one of the five best books on spycraft; The Killing of Major Denis Mahon (HarperCollins, 2007), praised by The Boston Globe as “a significant contribution to the literature of the Great Famine”; and The Bielski Brothers (HarperCollins, 2003), a story of Jewish rescue and resistance during the Holocaust, ”as amazing as Schindler’s List,” according to People magazine.
His journalism has been published in The New York Times, New York magazine, The Wall Street Journal, Slate, and many other publications.


