Death's apprentice

the long version

"Built on top of the gates of Hell, Grimm City is the Devil's capital on earth. A place where every coffee shop, nightclub and shopping mall is the potential hunting ground for a ghost, a demon, or any of the other supernatural entities that inhabit the Grimm City world. Death's seventeen-year-old apprentice, Nathaniel, comes into his own as he leads an uprising against the Devil with the help of a half-dead wraith and a giant hit-man. What results is a bloody, brutal revolt that calls upon the loyalties of both the living and the dead"--Front flap.