The Elder Shamans - The Bone Quest, #6

RIDMARK ARBAN was once an honored Swordbearer. Now he is a disgraced exile, outcast and alone. To redeem himself, he seeks the secret of the return of the Frostborn, and at last he has come to the grim citadel ruled by the Elder Shamans. But the Elder Shamans do not part with their secrets willingly. And their most dangerous secret might mean Ridmark's death...