The Vampire Hunters — Scott M. Baker

Modern day vampire hunters wage a brutal battle against the undead in the nation's capital. As former Boston cops, Drake Matthews and Alison Monroe thought they had experienced it all... until they found themselves tracking down a serial killer who turned out to be one of the undead. Stopping him cost them their careers and almost their lives. Thanks to an influential and anonymous benefactor, Drake and Alison find a new job ridding the streets of Washington D.C. of the vampiric threat terrorizing the nation's capital. Only this time, Drake and Alison are not facing a single vampire but an entire nest led by Ion Zielenska, one of history's most evil and twisted masters. As the vampires indiscriminately prey on humans, seeing them as nothing more than food to satiate their hunger, they create a wave of violence that threatens to engulf the city. Orchestrating the carnage is Antoinette Varela, the mistress of the nest, whose vendetta against the hunters is personal.