Night keepers - Jessica S. Andersen

As a Miami narcotics detective, Leah Daniels never knows how her day will turn out. But she certainly never expected to be strapped to a stone altar as the human sacrifice in an ancient Mayan ritual meant to coax a demon from the underworld. Or that she'd be saved by a handsome warrior-priest king who claims to recognise her from his visions. Jaguar Strike wishes he hadn't made the mistake of reuniting his fellow warrior-priests or broken the law by saving their sacrifice victim. Now he must join forces with Leah in a race against time.