Book 1: Hero of Frost With the country safely protected from invaders and the Emperor's life saved, Elsa believes her part is over. She's not a mistake anymore. Now she's a hero. And she has a prince all her own. Before Jack and Elsa's wedding, Jack is summoned to manage a disturbance during the construction of the Great Wall, a protective barrier which will surround the entire country. When Jack sends a distress letter to Elsa alone, it's up to her to set aside the fragile life she's built for herself and resume the role of a hero, even if it's a broken one. And a broken hero thrown in the middle of sieges and assassins doesn't stand a chance.