“The Haunter of the Dark” is a horror short story written by H. P. Lovecraft in November 1935, and published in the December 1936 edition of Weird Tales (Vol. 28, No. 5, p. 538–53). It was the last-written of the author’s known works, and is part of the Cthulhu Mythos. The epigraph to the story is the second stanza of Lovecraft’s 1917 poem “Nemesis”.
The story is a sequel to “The Shambler from the Stars”, by Robert Bloch. Bloch wrote a third story in the sequence, “The Shadow from the Steeple”, in 1950.