Blood Oath (Nathaniel Cade Book 1)

Brigid says: The premise is wild. Nathaniel Cade is a dedicated secret agent for the President of the United States Cade. But he's no ordinary agent—he's a centuries-old vampire bound by a blood oath to protect US citizens from the stuff of nightmares with the aid of his human handler Zach Barrows. This one is not for the faint of heart, but great for fans of Blade and unique odd couple/buddy cop duos. Content warnings apply.