The searcher/ Simon Toyne.

Enhanced descriptions from Syndetics:

The author of the acclaimed Sanctus trilogy conjures an eerie epic of good and evil, retribution and redemption--the first novel in the mesmerizing Solomon Creed series in which a man with no memory of his past must save a lost soul in a small Arizona town.

On a hilltop in the town of Redemption, Arizona, the townspeople gather at an old cemetery for the first time in decades to bury a local man. The somber occasion is suddenly disrupted by a thunderous explosion in the distant desert. A plane has crashed, and it's pouring a pillar of black smoke into the air.

As Sheriff Garth Morgan speeds toward the crash, he nearly hits a tall, pale man running down the road, with no shoes on his feet and no memory of who he is or how he got there. The only clues to his identity are a label in his handmade suit jacket and a book that's been inscribed to him: both giving the name Solomon Creed. When Morgan tells Solomon that he is in Redemption, Arizona, Solomon begins to believe he's here for a reason--to save a man he has never met . . . the man who was buried that morning.

Miles away, three men scan the skies for an overdue plane carrying an important package. Spotting a black cloud in the distance, they suspect something has gone badly wrong, and that the man who has sent them will demand a heavy price if the package has been lost.

To uncover the secret of his identity, Solomon Creed must uncover Redemption's secrets too and learn the truth behind the death of the man he is there to save. But there are those who will do anything to stop him, men prepared to call on the darkest forces to prevent Solomon from seeing the light.