The Dreams in the Witch House :

Step into the twisted geometry of nightmare in H. P. Lovecraft’s “The Dreams in the Witch House.” When Walter Gilman, a student at Miskatonic University, rents a room in Arkham’s infamous Witch House, he believes its strange angles hide cosmic secrets. Gilman is drawn into a nightmare of black magic, forbidden mathematics, and sacrificial horror.

Blending occult horror, cosmic dread, and dark fantasy, this story is one of Lovecraft’s most chilling contributions to the Cthulhu Mythos, exploring the terrifying intersection of science and sorcery.