Corelands. The Falling City, #2

To save his home, he must destroy it. Aurion Illica's life is buried in Lione's politics until an assassination attempt lands him in the hands of enemy Nurmi warriors, whom Lione had enslaved for decades. In exchange for his life, he leaves behind his affluent life and agrees to remain in the north and serve them. Lania, the Warrior of the Nurmi, never expected to save a Lionian councilman, but far from regretting it, she forms a bond with her old master.
She knows Aurion has a part to play as the Lionian Sovereignty fights on several fronts, but she cannot be sure whether he will be with or against her. As she grows close to Aurion, she prays he will stand at her side.