Blood Harvest by Russ Linton

Hunted by Death, one man will face the forces of Hell to get back home.

Former Baltimore cop Eustace "Ace" Grant is on a quest to find lost sorcery. An apprentice shaman, Ace walks the spirit realm in search of a cure for his terminal illness.

When asked to recover a Civil War sword, Ace finds traces of a magic more potent than he's ever experienced. Forged in England by a smith in possession of the Primal Flame, the blade had been intended for a different battle entirely - the one at the end of time.

That battle upon us, it's up to Ace to recover the sword. Without it, the world as we know it will be plunged into a nightmare. He'll find the sword or die trying. That is if his ghostly mentor, Atofo, will only let go of his soul...