In the Blood (Darkwing Chronicles #4)

Since the feds coerced sleek New York vampire Daphne Urban into spying for the U.S., she's been part of Team Darkwing. Their latest assignment: rescue the kidnapped daughters of the city's elite. The terrorists demand gold-and access to a military secret. So Darkwing goes on the prowl in the depraved, secret vampire underworld. It's a world of passions that Daphne has always shunned, until temptation finds her. And if she wants to save the kidnapped girls, she can't get distracted...