Pulitzer Prize Nonfiction Winners for past two years:
2010: The Dead Hand: The Untold Story of the Cold War Arms Race and Its Dangerous Legacy by David E. Hoffman
The Evolution of God by Robert Wright
How Markets Fail: The Logic of Economic Calamities by John Cassidy
2011: Emperor of All Maladies: A Biography of Cancer by Siddhartha Mukherjee
The Shallows: What the Internet is Doing to Our Brains by Nicholas G. Carr
Empire of the Summer Moon: Quanah Parker and the Rise and Fall of the Comanches, the Most Powerful Indian Tribe in American History by S.C. Gwynne
The complete list since 1962:
LINK