The Thirteenth Tale is a cozy antique mystery book written by Diane Setterfield. It follows the story of Margaret Lea, a young biographer who is summoned to write the biography of a famous author, Vida Winter. As Margaret delves into Vida's past, she uncovers a dark family secret and a tale of twins, ghosts, and gothic mysteries. This atmospheric and haunting book is a must-read for fans of cozy antique mysteries and gothic literature.