In 1880, Sir Robert Cargrave, a London physician known for his experimental work in paralysis treatment, is summoned to Gorslava by the mysterious Baron Sardonicus—who is now married to Cargrave's former wife, Maude—to treat his disfigurement. When Cargrave arrives, he finds the masked baron is a cruel sadist who has threatened to harm Maude if he is not successfully cured.

It was a monstrous constellation of unnatural light, like a glutted swarm of corpse-fed fireflies dancing hellish sarabands over an accursed marsh (...)'. H.P. Lovecraft was perhaps the greatest twentieth century practitioner of the horror story, introducing to the genre a new evil, monstrous, pervasive and unconquerable. At the heart of these three stories are terrors unthinkable and strange: a crash-landing meteorite, the wretched inhabitant of an ancient castle and a grave-robber's curse. This book includes "The Colour Out Of Space", "The Outsider" and "The Hound".