Several years ago, I read a book called “What is the What.” It is the extraordinary autobiography of Valentino Achak Deng, as told to novelist Dave Eggers (Eggers says he wrote it “in Valentino’s voice” but it is partially a novel, too). Valentino was one of the Lost Boys of Sudan, who literally ran from his home village of … More African Postman: Valentino Achak Deng Helps Build the Future in South Sudan