The Demon King and I

Heiress Gillian Caruthers, the eldest of the wealthy Caruthers sisters, who hides her identity as the Assassin--responsible for the elimination of troublesome interdimensional jumpers--is forced into an uneasy alliance with one of her enemies when Earth is threatened by a plague of murderous demons, in the first volume in a new series by the author of Charmed & Deadly. Original.