But gradually, over two years of conversations, Deo’s story came out. “I don’t see any way of doing this without spending time with a person,” Kidder said. “If you spend time, what you want to know will creep out.” The key is to listen, to be attentive, to be patient and not interrupt. Kidder told me he likes the version of himself that comes out when he’s trying to learn about another. He’s humbler, not talking so much. Kidder didn’t merely interview Deo; he accompanied him to the places where his story played out. They went back and visited the spot where he slept in Central Park, the supermarket where he worked as a delivery boy. Their walks together were a way of planting themselves in the concrete details of Deo’s experience. Eventually, they went to Burundi, to trace his journey through the genocide.