"The Slow Mutants" is a fantasy novella by American writer Stephen King, originally published in The Magazine of Fantasy and Science Fiction in July 1981. In 1982, "The Slow Mutants" was collected with four other stories King published in The Magazine of Fantasy and Science Fiction as The Dark Tower: The Gunslinger. "The Slow Mutants" formed the fourth chapter of the book, and was slightly revised for the inclusion.