Nicholas Olivo

The promise Vincent Corinthos made to Megan Hayes has been hanging over his head like the proverbial sword of Damocles. And now that sword has fallen. When Megan is murdered....

Four years ago, Caulborn agent Vincent Corinthos stopped a hellish ritual intended to transform Ulysses Pendleton into a creature of utter darkness....

Tapped for a black ops mission to repair the damage, Vincent finds himself under the command of a man who doesn't trust him, and allied with an enemy he hasn't seen in 400 years....

Vincent Corinthos has made his share of enemies. He's squared off against diabolical megalomaniacs, shadow lords and intergalactic conquerors. And now he and the rest of Boston's Caulborn....

Vincent Corinthos has two things going for him: he's a top operative of a secret agency tasked with handling paranormal threats, and he's half-god....

After a slip of the tongue, godling Vincent Corinthos is obligated to keep his partner, Megan, "fine" forever. Enter the Keepers, who fulfill promises for a fee....

Having done the impossible and walked out of hell, Vincent Corinthos sets his sights on saving Megan and bringing down Treggen once and for all. Captured by rogue agents, Vincent finds himself cut off from agency support and must escape from HQ....

When an omniscient demon corrupts the Chroniclers and taints time itself, it falls to Vincent Corinthos to set things right.

Doc Graystone's tropical vacation is cut short when brutes wearing magical masks hijack a truck full of gold....

Boston, 1932. Doc Graystone is contacted to evaluate security at a paranormal prison built by the US Navy....

The police are baffled by a series of killings in which mystical runes have been carved into the victims' flesh. Desperate for help, they turn to Doc Graystone, gentleman necromancer....

Doc Graystone is summoned to a remote temple in the mountains to battle a terrifying undead known as a jiangshi....