In a Glass Darkly

In a Glass Darkly is a collection of five stories by the Irish author Sheridan Le Fanu, first published in 1872, the year before his death. The second and third stories are revised versions of previously published stories. The first three stories are short stories, and the fourth and fifth are long enough to be called novellas (the fourth is over 44,500 words long, and the fifth is over 27,500 words long).

The five stories are related to the horror, mystery and suspense genre. In Green Tea, a man named Mr. Jennings begins seeing a monkey, which he believes is causing his madness. The Familiar follows Mr. Jervas, who becomes obsessed with a woman he feels he has met before, leading to tragic events.

Mr. Justice Harbottle tells the story of a bad judge who faces supernatural punishment for his evil actions. The Room in the Dragon Volant is about an Englishman who gets caught up in a dangerous mystery involving a woman and a haunted room in France. Finally, Carmilla is one of the earliest known works of vampire literature, predating Bram Stoker's Dracula (1897) by 25 years.

The book's title is an allusion to 1 Corinthians 13:12, a Biblical passage which describes humanity as perceiving the world "through a glass, darkly".