Darkwing Chronicles Series by Savannah Russe, Lucy Finn

The government knows that Daphne Urban is a vampire, and they have an ultimatum: spy for them, or be killed. She can speak 13 languages, has a genius IQ, and has escaped detection for nearly 500 years - making her perfect for Team Darkwing. Her first mission is to get close to a shady arms dealer with terrorist connections.

The word is out on Susto. It's a new recreational drug that intensifies sex, it's spreading like wildfire - and it's lethal. Team Darkwing's mission is to track the drug back to its origin. Immersing themselves in New York's nightlife, they discover ties between Susto's revenue and the country's most powerful political dynasty.

No one can tell that Daphne Urban is a vampire. But the government knows-and she's been recruited to spy for them. To get over a recent break-up, Daphne must throw herself into her work, joining her colleagues to chase down a ruthless enemy. Mysterious, cruel, and unstoppable, this assassin is dead-set on killing a certain presidential candidate. Now Team Darkwing has to find him before it's too late... moreNo one can tell that Daphne Urban is a vampire. But the government knows-and she's been recruited to spy for them. To get over a recent break-up, Daphne must throw herself into her work, joining her colleagues to chase down a ruthless enemy. Mysterious, cruel, and unstoppable, this assassin is dead-set on killing a certain presidential candidate. Now Team Darkwing has to find him before it's too late. But soon, Daphne finds herself drawn back into the life she once rejected: a secret vampire underworld, where all pleasures-like human blood-can be found. less

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...

The terrorist threat to America continues, but this time it's so top secret that only those in the highest circles of government know about it. As it unfolds, Daphne and the vampire spies, the Darkwings, become the first--and only--line of defense to save a city. Team Darkwing's assignment decipher and defuse the terrorist plot. But Daphne gets distracted when vampire hunters storm the city... moreThe terrorist threat to America continues, but this time it's so top secret that only those in the highest circles of government know about it. As it unfolds, Daphne and the vampire spies, the Darkwings, become the first--and only--line of defense to save a city. Team Darkwing's assignment decipher and defuse the terrorist plot. But Daphne gets distracted when vampire hunters storm the city. Is Darius, her hot-and-cold lover, behind their reappearance? This time, will he return to love Daphne--or to commit the ultimate act of betrayal? less