The Runebinder Chronicles

When magic returned to the world, it could have saved humanity, but greed and thirst for power caused mankind's downfall instead. Now once-human monsters called Howls prowl abandoned streets, their hunger guided by corrupt necromancers and the all-powerful Kin. Only Hunters have the power to fight back in the unending war, using the same magic that ended civilization in the first place. But they are losing.

Aidan desires only one thing: to rule. Arrogant, headstrong and driven by the element of Fire, he will stop at nothing to bring the evil Howls that destroyed Scotland to their knees. But Fire is a treacherous element, and the very magic that brought him to power could burn his world to ash. Especially with the blood of his fellow Hunters on his hands. 

Tenn thought the spirits wanted him to find his fellow Hunter, Aidan, to win the war against the undead. But with Aidan on the brink of self-destruction and Tenn reeling from his lover’s spite, their fated convergence seems far from promising. Especially because Aidan no longer appears to be fighting for the living. With the Dark Lady whispering commands and Tomás guiding his hand, Aidan slips deeper into darkness.