Scholastic Audiobooks

On the eve of the French and Indian War, Billy Bartram and his naturalist father travel into the American wilderness in an airship--pursued by a party of French soldiers and haunted by a terrifying bear-wolf--on a quest to find the lost kingdom of the Welsh prince Madoc.

Princess Solveig and her siblings are trapped in a hidden fortress tucked between towering mountains and a frozen fjord, along with her best friend and an army of restless soldiers, all awaiting news of the king's victory in battle, but as they wait for winter's end and the all-encompassing ice to break, acts of treachery make it clear that a traitor lurks in their midst.