The Shrinking Man
Also known as The Incredible Shrinking Man.
While on a boating holiday, Scott Carey is exposed to a cloud of radioactive spray. A few weeks later, following a series of medical examinations, he can no longer deny the extraordinary truth. Not only is he losing weight, he is also shorter than he was. Scott Carey has begun to shrink. Richard Matheson's novel follows through its premise with remorseless logic, with Carey first attempting to continue some kind of normal life and later having left human contact behind, having to survive in a world where insects and spiders are giant adversaries. And even that is only a stage on his journey into the unknown.
Richard Matheson
Richard Burton Matheson (1926–2013) was an American author and screenwriter, primarily in the fantasy, horror, and science fiction genres. He may be known best as the author of I Am Legend, a 1954 horror novel that has been adapted for the screen four times, although five more of his novels have been adapted as major motion pictures: The Shrinking Man, Hell House, What Dreams May Come, Bid Time Return (filmed as Somewhere in Time), A Stir of Echoes and The Box. Matheson also wrote numerous television episodes of The Twilight Zone for Rod Serling, including "Nightmare at 20,000 Feet" and "Steel". He later adapted his 1971 short story "Duel" as a screenplay which was promptly directed by a young Steven Spielberg, for the television movie of the same name.