About Walter M. Miller
Walter Michael Miller Jr. was an American science fiction writer. He wrote short stories that became a celebrated fix-up novel, A Canticle for Leibowitz (1959). His only novel published in his lifetime, it won the 1961 Hugo Award for Best Novel. In Miller's later years, he became a recluse, avoiding contact with nearly everyone, including family members; he never allowed his literary agent, Don Congdon, to meet him.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.