The Demon King and I — Candace Havens

The four Caruthers sisters are heiresses with privilege, wealth beauty, and brains. But these party girls have something extra as well. As the Guardian Keys, possessors of an ancient family secret, they also hold the fate of the world in their hands -- between cocktails.

Gallery owner Gillian Caruthers is a sensation in the art world -- in this world, that is. In her other world she's called the Assassin, a real knockout with an affinity for snuffing out dimension-jumpers who foul up her personal space. She never expected to join forces with one. But when a plague of murderous demons plunges the earth into darkness, she has no choice but to get a little help from a being who knows his stuff.

Arath, the demon king, isn't quite the scaly thing she expected. In fact, he's kind of hot -- and a bit of an enigma, if his strange past is any indication. In solving that riddle, as well as finding the cause for the sudden influx of mystical creatures on Earth, Gillian may just have to work more closely with Arath than she'd anticipated. And somewhere between the light and the darkness they might discover they have more in common than they imagined...