People of the Nightland

When a young orphan named Silvertip receives a prophetic vision about the end of their world, no one believes him, and he must join forces with his only two allies, a jaded war chief and a little girl, to persuade the People of the Nightland and the People of the Sunpath to flee eastward to escape the deadly ice, in an Ice Age saga set in the region of the Great Lakes. Reprint.