The Thing on the Doorstep by H.P. Lovecraft
A chilling story about possession and dark sorcery. The protagonist recounts his friend's descent into madness after marrying a woman with occult ties, leading to eerie body-swapping and the horror of identity loss. Themes of manipulation and arcane power dominate.

H.P. Lovecraft (1890–1937) was an American writer of cosmic horror, known for creating the Cthulhu Mythos. His works, including The Call of Cthulhu and The Shadow Out of Time, explore cosmic dread, ancient beings, and the insignificance of humanity, influencing modern horror literature.