The Traitor's Alliance: The Divalian Chronicles

The son of a ruthless Chief, Sasha Gundarson has always known he was destined to follow in his father's footsteps. It's what he's been preparing for his entire life. Until, that is, an accident throws him into the path of strangers who behave like no one he's ever met. A single act of kindness. A promise kept. And Sasha finds himself torn between everything he's ever known and a world he didn't even know existed.