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.

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.