Jack and the Hollow Hill

Jack dreams of becoming a great warrior like his father, even though he's not sure he'll ever be big enough. But when his father doesn't return from fighting the Viking invaders, Jack knows he has to step up to protect his family. After he has to move to a different village, he meets new friends, makes new enemies, and discovers strange new places. And when an unseen menace threatens his loved ones, Jack must rely on his wits and courage to unravel the secret of the Hollow Hill.