"The Terror" is a novella written by Arthur Machen, first published in 1917. It's a work of supernatural horror that explores themes of the uncanny and the unknown.

The plot centers around a group of friends who gather for an evening of storytelling. As they share their tales, they become increasingly disturbed by the recurring motif of a mysterious figure known as "The Terror," who seems to embody all their fears and anxieties. Each story adds another layer to the mystery surrounding The Terror, blurring the lines between reality and imagination.

Machen's novella is celebrated for its atmospheric prose and its exploration of psychological terror. It's considered one of his most accomplished works and has influenced many writers in the horror genre. "The Terror" remains a haunting and enigmatic masterpiece that continues to captivate readers with its sense of dread and unease.