Classics in speculative fiction, Arthur Machen's most famous stories are journeys through fear, madness, and the furthest regions of the unknown. A woman is rendered catatonic after a doctor's botched attempt at brain surgery. The surgery, it seems, has opened the woman to a forbidden fold in existence, a place not meant for human eyes, a place where "The Great God Pan" dwells. Years later, men of good position begin committing suicide in the most...