Gadgets, inventions, monstrous creatures, evil villains... No adventure is too BIG for Charlie Small! In the fifth journal found by us, the lucky and smug publisher, we learn that Charlie Small has become embroiled in an underworld from his nightmares . . . Previously, Charlie had bumped into the infamous Jakeman -- but when the mad professor was dragged down into the Underworld, Charlie had to follow - otherwise, how would he discover how to get back to his mum and dad? This latest adventure takes him into an unreal darkened world, where anything is possible. But will Charlie Small ever find a way out, or will he be trapped underground forever . . . ?