Death On The Rocks. Red City Reaper, #4

Death is a beast better left sleeping. After surviving the latest attempt on his life by werewolf bikers, Dax isn't waiting for the next hammer to fall. Getting shot sucks. And he's tired of pulling magical bullets from his body. His enemies may have awakened a power they can't handle. Nazi werewolf bikers are flooding into Red City. Despite building a crew, Dax is massively outnumbered. He's going to have to take the fight directly to the bikers.
If he waits, he'll be overwhelmed, and what's left of his quiet life will be destroyed. But as Dax reaches for his old powers, the death gods who banished him are taking notice. He walks a tight rope between defeating the bikers and being obliterated by his watchers.