The Atonement - Knights of the Imperial Elite, #2

Degraded and abased beyond redemption, Colin the Loyal trades his sanity, his brother, and his dignity for a shameful vendetta, demeaning his character until he is emptiness revered. Ryrie McCabe of the clan McLeod, a woman of Colin's past he never thought to see again, looks beyond his meaningless life. She gives him a reason to believe in redemption. When the Gray Legion tips the scale of treachery, Colin is ready to martyr his soul for her and never-ever regret it.