Books with title Wind on Fire Trilogy - Box Set of 3

Led by Hanno and Ira Hath, 32 mostly Manth survivors of the fall of the Mastery search for the fabled Homeland. Ira knows that as long as she feels the warmth on her face, despite the wintry conditions, they are heading in the right direction. She also knows that, according to the prophecy, she will die when they reach the homeland. She grows weaker with every step. Hanno must keep up the spirits of the marchers on the gruelling.