TKKG 218 - Demon Protection Money

Dodgem cars, Breakdancer, Ferris wheel - Tim, Karl, Gaby, and Klösschen find it hard to decide which ride to go on first. And then, of course, there's the famous haunted house, Ghost World. However, the fun at the fair is short-lived, as very unusual things start happening as if by ghostly hands: Klösschen is attacked by a one-armed knight figure in the haunted house, and the Breakdancer goes out of control. TKKG gets involved. At first, it all seems to be the nasty scheme of an extortion gang, but then the four detectives stumble upon the Codex Gaudiorum - a mysterious medieval directory that could explain the puzzling events. But could it be that the fairground is actually haunted?.