罗伯特·奥布莱恩，Robert Lesley Conly aka Robert C. O'Brien was an American author best known for his 1975 novel 'Z for Zachariah', a post-apocalyptic story set in the wake of World War III. It follows sixteen-year-old central protagonist Ann Burden, who has survived a nuclear war having found a remote section of valley that is protected from nuclear fallout.