The Terrible Old Man

The Necronomicon, also referred to as the Book of the Dead, or under a purported original Arabic title of Kitab al-Azif, is a fictional grimoire appearing in stories by the horror writer H. P. Lovecraft and his followers. It was first mentioned in Lovecraft's 1924 short story "The Hound", written in 1922, though its purported author, the "Mad Arab" Abdul Alhazred, had been quoted a year earlier in Lovecraft's "The Nameless City". Among other things, the work contains an account of the Old Ones, their history, and the means for summoning them.

Shub-Niggurath is a deity created by H. P. Lovecraft. She is often associated with the phrase "The Black Goat of the Woods with a Thousand Young". The only other name by which Lovecraft referred to her was "Lord of the Wood" in his story The Whisperer in Darkness.

Arkham is a fictional city situated in Massachusetts, United States. An integral part of the Lovecraft Country setting created by H. P. Lovecraft, Arkham is featured in many of his stories and those of other Cthulhu Mythos writers.

"The Call of Cthulhu" is a short story by American writer H. P. Lovecraft. Written in the summer of 1926, it was first published in the pulp magazine Weird Tales in February 1928.

Azathoth is a deity in the Cthulhu Mythos and Dream Cycle stories of writer H. P. Lovecraft and other authors. He is the supreme deity of the Cthulu Mythos and the ruler of the Outer Gods, and may also be seen as a symbol for primordial chaos, therefore being the most powerful entity in the entirety of the Cthulhu Mythos.

"The Music of Erich Zann" is a horror short story by American author H. P. Lovecraft. Written in December 1921, it was first published in National Amateur, March 1922.

"The Cats of Ulthar" is a short story written by American fantasy author H. P. Lovecraft in June 1920. In the tale, an unnamed narrator relates the story of how a law forbidding the killing of cats came to be in a town called Ulthar. As the narrative goes, the city is home to an old couple who enjoy capturing and killing the townspeople's cats. When a caravan of wanderers passes through the city, the kitten of an orphan (Menes) traveling with the band disappears. Upon hearing of the couple's violent acts towards cats, Menes invokes a prayer before leaving town that causes the local felines to swarm the cat-killers' house and devour them. Upon witnessing the result, the local politicians pass a law forbidding the killing of cats.

"The Colour Out of Space" is a science fiction/horror short story by American author H. P. Lovecraft, written in March 1927. In the tale, an unnamed narrator pieces together the story of an area known by the locals as the "blasted heath" in the hills west of the fictional town of Arkham, Massachusetts. The narrator discovers that many years ago a meteorite crashed there, poisoning every living being nearby: vegetation grows large but foul-tasting, animals are driven mad and deformed into grotesque shapes, and the people go insane or die one by one.

The Dunwich Horror is a horror novella by American writer H. P. Lovecraft. Written in 1928, it was first published in the April 1929 issue of Weird Tales (pp. 481–508). It takes place in Dunwich, a fictional town in Massachusetts. It is considered one of the core stories of the Cthulhu Mythos.

"Pickman's Model" is a short story by H. P. Lovecraft, written in September 1926 and first published in the October 1927 issue of Weird Tales.

Lovecraft Country is a term coined for the New England setting used by H. P. Lovecraft in many of his weird fiction stories, which combines real and fictitious locations. This setting has been elaborated on by other writers working in the Cthulhu Mythos. The phrase was not in use during Lovecraft's own lifetime; it was coined by Keith Herber for the Lovecraftian role-playing game Call of Cthulhu.

"The Festival" is a short story by H. P. Lovecraft written in October 1923 and published in the January 1925 issue of Weird Tales.

The Whisperer in Darkness is a 26,000-word novella by American writer H. P. Lovecraft. Written February–September 1930, it was first published in Weird Tales, August 1931. Similar to The Colour Out of Space (1927), it is a blend of horror and science fiction. Although it makes numerous references to the Cthulhu Mythos, the story is not a central part of the mythos, but reflects a shift in Lovecraft's writing at this time towards science fiction. The story also introduces the Mi-Go, an extraterrestrial race of fungoid creatures.

"The Rats in the Walls" is a short story by American author H. P. Lovecraft. Written in August–September 1923, it was first published in Weird Tales, March 1924.

"The Hound" is a short story written by H. P. Lovecraft in September 1922 and published in the February 1924 issue of Weird Tales. It contains the first mention of Lovecraft's fictional text the Necronomicon.

"Cool Air" is a short story by the American horror fiction writer H. P. Lovecraft, written in March 1926 and published in the March 1928 issue of Tales of Magic and Mystery.

"The Thing on the Doorstep" is a horror short story by American writer H. P. Lovecraft, part of the Cthulhu Mythos universe. It was written in August 1933 and first published in the January 1937 issue of Weird Tales.

"The Shunned House" is a horror fiction novelette by American author H. P. Lovecraft, written on October 16–19, 1924. It was first published in the October 1937 issue of Weird Tales.

"The Strange High House in the Mist" is a short story by H. P. Lovecraft. Written on November 9, 1926, it was first published in the October 1931 issue of Weird Tales. It concerns a character traveling to the titular house which is perched on the top of a cliff which seems inaccessible both by land and sea, yet is apparently inhabited.