Frostborn: The False King (Frostborn Series #11) in Bloomington, MN

Ridmark Arban is the Gray Knight, leading the war against the malevolent Frostborn. After a year of battle, the war has ground to a bloody stalemate. Unless Ridmark can find new allies, the Frostborn will win through slow attrition. But the shadow of the Frostborn has fallen over all lands, and Ridmark might not live long enough to find new allies...