Hitman. Ace of Killers

"Tommy Monaghan has made a few enemies in his time -- it's an occupational hazard for any professional hitman. But while Tommy's special abilities (x-ray vision, telepathy, a winning smile) have brought him many profitable assignments, they've also put him on the bad side of some particularly unforgiving and vengeful demons. Fortunately, Tommy has friends in low places, and their firepower -- if not their sobriety -- rivals that of your average S.W.A.T. team. Unfortunately, while Tommy's human allies are (mostly) trustworthy, the same can't be said for a certain rhyming hellspawn who holds the key to everyone's survival in his sulfurous hands."--Volume 4 cover