The just-unleashed demon hordes have delivered an impossible ultimatum to the Order of the Crow: produce the Philosopher's Stone, or suffer a deadly reaper storm of retribution. If Donna cannot recreate the mythical artefact, the world will be plunged into a devastating modern-day Dark Age.
Pitting her dangerously unpredictable powers against a vengeful demon king, two maleficent faery queens and an immortal magus with his own shadowy agenda, Donna must be willing to make the ultimate sacrifice. But, this time, death may not be enough...
The final, breathtaking story in the Iron Witch trilogy.