Based on the classic adventure-thriller by John Buchan. Richard Hannay is in a race against time. Can he crack the code that could prevent an invasion? Or will the ruthless agents of the sinister Black Stone get to him first? Is anywhere safe? Whom can he trust? And just what is the secret of the 39 steps? Part of Series Three of the Usborne Reading Programme, for children whose reading ability and confidence allows them to tackle longer, more complex stories. Includes fascinating facts about the story.