Spook trains in the dead of night! And they seem to vanish into thin air - but where do they go? The Famous Five are on to it! But the discovery of an unusual underground tunnel system and a secret train-service has them puzzled. If they follow the tracks, will they solve the mystery? Babette Cole, Polly Dunbar, David Tazzyman, Tony Ross and Shirley Hughes have re-imagined Blyton's classic series for today's readers.