Metal Soul by Michelle Frost

Three men. One destiny.

Zeb hasn’t seen his brother since the war, and despite finding a place within the Warren pack and befriending his potential mate, he’s lonely.
Josh only wants to live up to the Warren name—to protect his pack and territory to the best of his ability. He keeps the secret that he’s been in love with his potential mate since they met close to his chest. Zeb made it clear he doesn’t think Josh is mature enough for them to be mates yet, and Josh has only been waiting for the chance to prove him wrong.
Neither man expects Seven—a man whose body and mind have been altered against his will. The secrets locked in Seven’s memories could be the key to saving Zeb’s brother and stopping a war before it starts. All they have to do is embrace the path fate has set before them and each other.