Nightbound

the long version

Beaumaris of York has many secrets. No human can know that he's an immortal Darkyn assigned to Knight's Realm, the Kyn stronghold disguised as a medieval theme park. And none of his brethren can discover that he's a half-breed, rescued from slavery as a child. Lately Beau has been yearning for action -- and he's about to find it with his new mission. Brilliant archaeologist Dr. Alys Stuart is infamous for her extraordinary theories -- especially those concerning the mysterious Knights Templar -- and she is unaware that her research is funded by the Kyn coffers. When the Kyn sends a vexingly good-looking man to assist -- and protect -- her, she doesn't expect the surge of attraction she feels for him. When a powerful Templar artifact surfaces, Alys and Beau must trust each other enough to stop mankind's greed for immortality from sparking a war between mortals and Kyn that will destroy the world.