DownFallen (Realms of the Infinite) (Volume 3)

Corban Thaenfall is a nobleman, a murderer, and a traitor, with no hope of redemption...until he joins the fight to save a royal Dynasty. Matteo of Darzeq, lastborn son of King Jonatan, has never imagined becoming king of Darzeq--least of all when the path to Darzeq's throne has been stained with his own family's blood. Driven by the desire for justice, Matteo recognizes an unwilling ally in Lord Corban Thaenfall, whose thirst for redemption matches Matteo's longing for vengeance against his enemies. But will the price of victory be more than either man intends to pay?