The Devil and His Boy is a historical adventure novel by Anthony Horowitz. The story is set in 1593 London and follows a young orphan named Tom who runs away from his cruel master. He stumbles into a world of theatre, danger, and secrets, eventually finding himself in the service of a mysterious and sinister master. The plot is a dark, thrilling journey through Elizabethan society, mixing historical detail with a sense of underlying supernatural threat, forcing Tom to confront both the good and evil in the world around him.