The Thing on the Doorstep (Unabridged‪)‬

Friends since childhood, Dan and Edward had a closeness that allowed them to share the deepest of secrets. Yet when Edward's marriage led him into a study of the dark arts it drove a wedge of horror between these best of friends. 

In this classic stand-alone tale of horror, occultism, and madness, H. P. Lovecraft adds to his mythos with a tale that builds on the story of the Escape from Innsmouth. Interestingly it also crosses over with the Robert E. Howard's story called The Black Stone, making this story an essential for fans of Lovecraft and his Cthulhu mythos.