Harlan EllisonHarlan Ellison.

Harlan Jay Ellison (May 27, 1934, June 28, 2018) was an American writer, known for his prolific and influential work in New Wave speculative fiction and for his outspoken, combative personality. His published works include more than 1,700 short stories, novellas, screenplays, comic-book scripts, teleplays, essays, and a wide range of criticism covering literature, film, television, and print media. Some of his best-known works include the 1967 Star Trek episode "The City on the Edge of Forever", which is regarded as one of the best episodes in the Star Trek franchise, he subsequently wrote a book about the experience that includes his original teleplay, his A Boy and His Dog cycle (which was made into a film), and his short stories "I Have No Mouth, and I Must Scream" (later adapted by Ellison into a video game) and "'Repent, Harlequin!' Said the Ticktockman".