Steve Coll is the author of the Pulitzer Prize-winning Ghost Wars and the dean of the Graduate School of Journalism at Columbia University, and from 2007 to 2013 was president of the New America Foundation, a public policy institute in Washington, D.C. He is a staff writer for The New Yorker, and previously worked for twenty years at The Washington Post, where he received a Pulitzer Prize for explanatory journalism in 1990. He is the author of seven other books, including On the Grand Trunk Road, The Bin Ladens, and Private Empire. His most recent book, Directorate S: The C.I.A. and America’s Secret Wars in Afghanistan and Pakistan (Penguin Press) tells the epic and enthralling story of America’s intelligence, military, and diplomatic efforts to defeat Al Qaeda and the Taliban in Afghanistan and Pakistan since 9/11. This is the definitive explanation of how America came to be so badly ensnared in an elaborate, factional, and seemingly interminable conflict in South Asia. Nothing less than a forensic examination of the personal and political forces that shape world history, Directorate S is a complete masterpiece of both investigative and narrative journalism.