The mysterious Beccaria Cage could be the cure for Aubrey's condition: a way to reunite his body and soul. But could its usefulness hide something more sinister?
After Aubrey narrowly escapes the worst fate he can imagine, he realises there is only one thing to do: he must confront his nemesis. With George and Caroline at his side, he travels to Holmland - the home of Dr Tremaine and the heart of hostile territory - only to face magical conundrums, near-death experiences, ghosts, brigands and enemies on their own ground.
Fisherberg is a city on a knife edge. Can Aubrey solve its mysteries before Dr Tremaine's warmongering machinations tip the world into chaos?