Horror is a genre of fiction that is intended to disturb, frighten or scare. Horror is often divided into the sub-genres of psychological horror and supernatural horror, which are in the realm of speculative fiction. Literary historian J. A. Cuddon, in 1984, defined the horror story as "a piece of fiction in prose of variable length... which shocks, or even frightens the reader, or perhaps induces a feeling of repulsion or loathing". Horror intends to create an eerie and frightening atmosphere for the reader. Often the central menace of a work of horror fiction can be interpreted as a metaphor for larger fears of a society. Prevalent elements include ghosts, demons, vampires, monsters, zombies, werewolves, the Devil, serial killers, extraterrestrial life, killer toys, psychopaths, sexual deviancy, rape, gore, torture, evil clowns, cults, cannibalism, vicious animals, the apocalypse, evil witches, dystopia, and human-made or natural disasters. Source: Wikipedia (en)