Chronicles of Ancient Darkness #2: Spirit Walker - Michelle Paver - Bog

As the Moon of No Dark waxes large, the clans fall prey to a horrifying sickness. Fear stalks the Forest. 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?forever.