The Whisperer in Darkness by H. P. Lovecraft

After a devastating flood in rural Vermont reveals strange bodies in the river, a scholar begins corresponding with a reclusive local who claims the creatures are real—and not of this Earth. As he travels to meet this man, he uncovers a terrifying truth about cosmic entities that communicate through whispering voices and inhabit human bodies. The plot builds from eerie folklore to full-blown extraterrestrial horror. A tense, slow-burn mystery that leads to a chilling twist. A landmark Lovecraft story blending folklore, science fiction, and paranoia.