The Tower Chronicles: Geisthawk Vol 1 al 5

He Lives to Kill the Dead! Written by Matt Wagner, award-winning creator of Grendel and Mage, and developed with Thomas Tull, executive producer of 300 and The Dark Knight, The Tower Chronicles is the tale of John Tower, a supernatural bounty hunter who tracks down the creeping shadows that the modern world has all but forgotten. His harrowing missions lead him across the globe and into the darkest recesses of mankind's most dangerous places to banish a wide variety of poltergeists, demons, and other unfathomable evils to free his troubled patrons from their tormentors' ethereal grasp.