"Raymond Douglas "Ray" Bradbury (August 22, 1920) is an American mainstream, fantasy, horror, science fiction, and mystery writer.
Best known for his dystopian novel Fahrenheit 451 and The Martian Chronicles, Bradbury is widely considered one of the greatest and most popular American writers of speculative fiction of the twentieth century.
Ray Bradbury's popularity has been increased by more than 20 television shows and films using his writings."
Source: Wikipedia, "Ray_bradbury", available under the CC-BY-SA License.
Note: This is not the same person as the British Ray Bradbury (1950-2008), an author or magician who was involved in running several Novacons science fiction conventions.