The Apples of Idunn: Eschaton Cycle (Gods of the Ragnarok Era Book 1)
Only a fool would venture into the freezing mists that steal the souls of men. And that’s exactly where Odin is going. When a frost giant murders his father, Odin swears blood vengeance. Guided by his blood-brother Loki, Odin battles rival tribes and perilous ghosts.