science fiction

Ray Douglas Bradbury (August 22, 1920 – June 5, 2012) was an American fantasy, horror, science fiction, and mystery writer. Best known for his dystopian novel Fahrenheit 451 (1953) and for the science fiction stories gathered together as The Martian Chronicles (1950) and The Illustrated Man (1951), Bradbury was one of the most celebrated 20th-century American writers of speculative fiction. Many of Bradbury's works have been adapted into television shows or films.

Ray Bradbury cause of death
Bradbury died in Los Angeles, California, on June 5, 2012, after a "lengthy illness".  Ray Bradbury was 91 years old at the time of his death