Devil Said Bang

Devil Said Bang is the fourth novel in the series.

Description
In his previous three adventures—Sandman Slim, Kill the Dead, and Aloha from Hell—Stark has fled Hell for California, taken on angels, demons, outlaw bikers, zombies, covert government operatives, and all manner of monsters, while saving humankind from total annihilation on numerous occasions. But in Devil Said Bang, he finally assumes the role he was destined for: as the new Lucifer, ruler of the Underworld.

Stark has to come to terms with being the new ruler of hell, and he quickly learns that being Lucifer isn't all it's cracked up to be as he dodges assassination attempts, insubordinate servants, and the endless bureaucracy of infernal politics. He eventually returns to L.A. just in time to deal with the fallout from his angelic half's activities, reunite with Candy, and stop the end of the world. Again.