Sticks across the chimney

When young Siri and Erik and their widowed mother buy a deserted farm with an ancient Viking grave mound on the land, they have no idea of the challenges and adventures that await them. First they must use their wits and humor to survive without money, as well as deal with suspicious townspeople. Later they participate in the mysterious and exciting events that lead to the opening of the mound and the discovery of a rich hoard of ancient Viking treasure.