War is coming. To avert catastrophe, Skulduggery and Valkyrie are sent on a secret mission that takes them away from everything they know, to a forsaken land of magic and grim, unrelenting terror. It is here that Valkyrie will have to fight the hardest - not only against the enemies who want her dead, but also against her own self-destructive impulses... 12+ The thirteenth thrilling novel in the internationally bestselling Skulduggery Pleasant series.