Skulduggery Pleasant: Mortal Coil

Skulduggery Pleasant and Valkyrie Cain are back. While they struggle to protect a known killer from an unstoppable assassin, Valkyrie is on a secret mission of her own. This quest, to prevent her dark and murderous destiny, threatens to take her to the brink of death and beyond. And then the body-snatching Remnants get loose... Book 5 in the series.