The Ravener: Kill the Messenger by Spencer Lackey

The Ravener Farrek is hired to journey across the country to retrieve a mysterious and valuable package. It’s supposed to be a simple job, but he’s not the only one looking for it. A sadistic assassin, a band of ruthless mercenaries, and a former lover, also a Ravener, are after it as well, and they’ll stop at nothing to get it before he does.

A swashbuckling, action-packed adventure set in the fictional land of Lanterra, with elements of steampunk sci-fi and medieval fantasy, Kill the Messenger is the first book in The Ravener Series.