John Keith Laumer (June 9, 1925 – January 23, 1993) was an American science fiction author. Prior to becoming a full-time writer, he was an officer in the United States Air Force and a diplomat in the United States Foreign Service. His older brother March Laumer was also a writer, known for his adult reinterpretations of the Land of Oz (also mentioned in Laumer's The Other Side of Time). Frank Laumer, their youngest brother, is a historian and writer.