The Kensei — Jon F. Merz

Meet Lawson. A cynical, wise-cracking vampire charged with protecting the Balance between vampires and humans, he is part cop, part spy, and part commando -- James Bond with fangs. Lawson mixes shrewd cunning with unmatched lethality to get his job done. He tries his best to dismantle conspiracies, dispatch bad guys, and live long enough to get home. In The Kensei, a battle-weary Lawson heads to Japan for a little rest and some advanced ninja training. But he no sooner steps off the plane than lands in the midst of a Yakuza turf war orchestrated by a shadowy figure known as the Kensei. With the help of Talya, a former KGB-assassin, Lawson must put a stop to the Kenseis organ trafficking networks, prevent the creation of an army of vampire-human hybrids, and save his own skin in the process.