George R. R. Martin writes in the sci fi genre.
George R. R. Martin . George Raymond Richard Martin ( born George Raymond Martin ; September 20 , 1948 ) , often referred to as GRRM , is an American novelist and short-story writer in the fantasy , horror , and science fiction genres , screenwriter , and television producer . Science fiction ( often shortened to SF , sci-fi or scifi ) is a genre of speculative fiction , typically dealing with imaginative concepts such as futuristic science and technology , space travel , time travel , faster than light travel , parallel universes , and extraterrestrial life .