Philip José Farmer (January 26 1918 - February 25 2009) was an American author known for his science fiction and fantasy novels and short stories.
Isaac Asimov born Isaak Ozimov, (January 2 1920 - April 6 1992) was a Jewish-American writer and professor of biochemistry at Boston University. He was known for his works of science fiction and popular science.
Robert Anson Heinlein (July 7 1907 - May 8 1988) was an American science fiction writer. Often called the "dean of science fiction writers", His sometimes controversial works continue to have an influential effect on the genre.
Sir Arthur Charles Clarke, CBE, FRAS (16 December 1917 - 19 March 2008) was a British science fiction writer, science writer and futurist, inventor, undersea explorer and television series host.