Gerald "Jerry" Neal Williamson (April 17, 1932 – December 8, 2005) was an American horror writer and editor known under the name J. N.
In 2003 he received a lifetime achievement award from the Horror Writers of America.
He edited the critically acclaimed How to Write Tales of Horror, Fantasy & Science Fiction (1987) which covered the themes of such writing and cited the works of such writers as Robert Bloch, Lee Prosser, Richard Matheson, Ray Bradbury, H. P. Lovecraft, August Derleth, William F. Nolan, and Stephen King.
In 1946, Williamson founded The Illustrious Clients of Indianapolis, a Sherlock Holmes scion society of the Baker Street Irregulars.
Williamson recalled in a 2003 interview that his first work of fiction was a Sherlock Holmes pastiche called "The Terrible Death of Crosby, The Banker".