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Sonia has always dreamed of travelling with her Uncle Hendrik. Until recently, her only connection to travelling was a fibula he had found on the Lofoten Islands as a confirmation gift. But before she could admire it, a certain Espen came to collect the millennium-old jewellery... And not only did he take back what Uncle Hendrik had stolen from him, but he also took Sonya with him to the Jotundal Forest, a place not for humans. Thus began her first journey, during which she had to beware not only of warlike Vikings and trolls, but also of the resentful snake Yalmar. Rumour has it that he will devour everything on his way until he finds a human...