Spirit Walker

From the front flap of the Orion first edition: "Torak is a boy apart. A boy who can talk to wolves. A boy who must vanquish the Soul-Eaters... or die trying. As the Moon of No Dark waxes high, the clans fall prey to a horrifying sickness. Fear stalks the forest. The very breath of summer seems poisoned. No one knows the cause - and only Torak can find the cure. His quest takes him across the sea to the mysterious islands of the Seal Clan. Here, Torak battles an unseen menace, and uncovers a betrayal that will change his life for ever."