Nature and popular science Jørn H. Hurum, Torstein Helleve, Esther van Hulsen (ill.) Roar - the life of a Triceratops 2022
Non-fiction for children and young adults Jørn H. Hurum, Torstein Helleve, Esther van Hulsen (ill.) Roar 2022
Non-fiction for children and young adults Jørn Hurum, Torstein Helleve, Esther van Hulsen (ill.) Ida 2012
