El hacha de los ancestros (Herederos, 4)

After his defeat at the hands of the Heirs, Mordred has once again vanished without a trace... until now. For this new mission, the Heirs must bundle up to brave the extreme cold on their expedition to Norway. Olaf’s grandmother has disappeared. What does the evil sorcerer plan to do with her? Time is running out, and they must find the Axe of the Ancestors before it is too late. Imbued with unique power, the axe is the Heirs' last hope of rescuing Olaf’s grandmother. Will they be able to defeat Mordred? Will they find the Axe of the Ancestors? And most importantly: will they be able to save Olaf’s grandmother?