The call of Cthulhu
By H. P. Lovecraft
Cover: The Destruction of Leviathan (1865), wood engraving by Gustave Doré (1832-1883) · Wikimedia Commons · Public domain (artist died 1883; published 1865)
"The Call of Cthulhu" is a cosmic horror 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. The story is a founding document of the Cthulhu Mythos, a mythopoeia and shared fictional universe expanded upon by Lovecraft and successors.
Summary source: Wikipedia: The Call of Cthulhu · CC BY-SA 4.0