The Crown Tower (The Riyria Chronicles 1)

Two men with nothing in common are forced into a partnership. Hadrian Blackwater, a warrior without a war, and Royce Melborn, a thief with nothing to hold him back, are hired for a seemingly impossible task.

The Crown Tower, an unbreachable fortress protecting the realm's most valuable treasures, stands between them and their goal. Their client, an old wizard, seeks something hidden within its walls, but neither understands what he wants.

The wizard's biggest challenge may not be the tower itself, but keeping Hadrian and Royce from destroying each other before they can complete their mission. Their success, and perhaps their survival, hinges on overcoming their mutual animosity and working together.