Lovecraftian horror is a subgenre of horror fiction that emphasizes the cosmic horror of the unknown (and in some cases, unknowable) more than gore or other elements of shock, though these may still be present. It is named after American author H. P. Lovecraft (1890 – 1937).
Lovecraft refined this style of storytelling into his own mythos that involved a set of supernatural, pre-human, and extraterrestrial elements.His work was inspired by and similar to previous authors such as Edgar Allan Poe,Algernon Blackwood and Lord Dunsany.
The hallmark of Lovecraft's work is cosmicism: the sense that ordinary life is a thin shell over a reality that is so alien and abstract in comparison that merely contemplating it would damage the sanity of the ordinary person. Lovecraft's work is also steeped in the insular feel of rural New England, and much of the genre continues to maintain this sense that "that which man was not meant to know" might be closer to the surface of ordinary life outside of the crowded cities of modern civilization. However, Lovecraftian horror is not restricted to the countryside; "The Horror at Red Hook", for instance, is set in a crowded ethnic ghetto.
Several themes found in Lovecraft's writings are considered to be components of a "Lovecraftian" work:
Much of Lovecraft's influence is secondary, as he was a friend, inspiration, and correspondent to many authors who would gain fame through their creations. Many of these writers also worked with Lovecraft on jointly-written stories. His more famous friends and collaborators include Robert Bloch, author of Psycho; Robert E. Howard, creator of Conan the Barbarian; and August Derleth, who codified and added to the Cthulhu Mythos.