Diamond In the Shade — D.J. Manly

Diamond has never known anything but death and destruction. An abandoned baby left to die, he was raised in a monastery and trained to kill. When his trainer pays him an unexpected visit in his native Hungary, Diamond is surprised to learn that he is needed in North America, where a curious and seemingly unstoppable force is at work.

Sebastian Shade also fights vampires, but with a difference. He is one. Reformed by love experienced and lost some years before, Sebastian was urged out of his self-imposed hibernation and secretly recruited to help the Order of Destroyers fight evil. Now in present-day New York, he continues his work, along with his team of mortals.

Diamond arrives in New York and goes straight to work, not knowing that Sebastian Shade is hunting the same villain as he. When they meet, it's fireworks, and in more ways than one, when they finally come to the realization that if they are going to defeat this evil, they'll have to do it together.