Christopher Hitchens, who died in December 2011 from complications related to esophageal cancer, was a columnist for Vanity Fair, and the author of Hitch-22 and God Is Not Great. Brooks Kraft/Corbis hide caption

itoggle caption Brooks Kraft/Corbis

Paul Auster is the author of fiction including The New York Trilogy and In the Country of Last Things. Lotte Hansen/Picador hide caption

itoggle caption Lotte Hansen/Picador