Back Lash — Devon Monk

Magic isn't a blessing with drawbacks, it's a curse with upsides.

Shame Flynn and Terric Conley hadn't meant to become the living, breathing vessels for Death and Life magic. But they hadn't meant to die, be reborn, break magic, save the world, and kill a few psychopaths along the way, either.
The one thing they had meant to do was to seal magic away so it could never be used to kill again.
When a string of dead bodiesâ€"people killed by magicâ€"appear throughout Portland, Oregon, Shame and Terric must scramble to uncover who broke the locks on magic and how.
Before Terric's sister becomes the next target.
Before the Russian mob locks them in their sights.
Before the question of who can control magic is decided by bullets and blood.