The Mysteries of Udolpho is a classic gothic novel written by Ann Radcliffe. Set in the late 18th century, the story follows the young orphaned heroine Emily St. Aubert as she encounters mysterious and supernatural occurrences in the remote castle of Udolpho. Filled with suspense, romance, and eerie atmospheres, this novel is a must-read for fans of gothic literature and those who enjoy tales of mystery and suspense.