Bones and Catson are on a train bound for Paris when another passenger, a famous magician, vanishes in the night. Catson is convinced of foul play... but none of the other passengers seem to know anything about the magician. Was he on the train at all? And how is his disappearance connected with a fiendish plot to steal the world's most famous painting, the Mona Lemur? Bones and Catson are up against it to solve the mystery before it's too late. 8+ Including search games, mazes and maths conundrums.