Vance Silver, Vampire, Hunter. Volumes 1-5

Vance Silver moved to Los Angeles seeking a new mentor to hunt vampires at his side. Looking for a legend, he found only a vampire kingdom controlled by the most morally bankrupt bloodsuckers. He finds himself thrown into the deep end and quickly drowns. When he wakes as a vampire, he's stronger and learns he can be an even better vampire hunter, but the cost is heavy on his soul.