Wolf Brother by Michelle Paver

Six thousand years ago. Evil stalks the land. Only twelve-year-old Torak and his wolf-cub companion can defeat it. Their journey together takes them through deep forests, across giant glaciers, and into dangers they never imagined. In this page-turning, original, and spectacularly told adventure story, Torak and Wolf are joined by an incredible cast of characters as they battle to save their world, in this first book in the Chronicles of Ancient Darkness.