Last Stand of Dead Men (Skulduggery Pleasant Book 8), Derek Landy

He’s dead. She’s deadly. The bad guys don’t stand a chance.

The eighth book in the bestselling Skulduggery Pleasant series. Two wars rage. One is a war between Sanctuaries – a war of loyalty and betrayal and last, desperate stands.

The other is a war within Valkyrie Cain’s own soul. If she loses, Darquesse will rise. And the world will burn.