This week in the magazine, Ian Buruma writes about the exiled Chinese writer Liao Yiwu whose prison memoir, "For a Song and a Hundred Songs," was recently published in English. Liao is also known for his book of interviews, "The Corpse Walker," which is made up of talks with Chinese prisoners and other marginal characters. Philip Gourevitch helped publish the first English translations of those interviews and has blogged about Liao Yiwu extensively on newyorker.com. Here, Buruma and Gourevitch talk about why Liao doesn't consider himself a political dissident, why his writing is threatening to the Chinese government, and the challenges of living in exile.