Johannes Cabal, the necromancer / Jonathan L. Howard.

Enhanced descriptions from Syndetics:

Johannes Cabal, a brilliant scientist and notorious snob, is obsessed with raising the dead. Tormented by a dark and harrowing secret, he travels to the fiery pits of hell to retrieve his soul, long ago sold to the Devil. Satan, incredibly bored and hungry for a challenge, proposes a little wager: Johannes has one year to persuade one hundred people to sign over their souls or he will lose his forever. To keep things interesting, he generously throws in a traveling carnival to help Johannes collect on the bargain. With little time to lose, Johannes raises a crew from the dead and enlists his brother, Horst, a charismatic vampire, to be his right-hand man. Once on the road, Johannes and his troupe of reprobates cause mayhem at every stop. But are his tricks enough to beat the Devil at his own game? Combining the chills and thrills of old-fashioned gothic tales, the rollicking humor ofWicked, and the sophisticated charms ofJonathan Strange & Mr. Norrell, JOHANNES CABAL THE NECROMANCER turns the oldest tale in the world into a fresh and irresistible adventure.