- Arctic Animals and Their Adaptations
- The Arctic in the Warming Climate
- Isbjørnen - den arktiske mester
- Polar Bears: In the Realm of Ice
- Den arktiske dyreverden
- The World of Polar Bears: A 100-Year Exploration from a Legendary Guide
Articles
- "What is the Arctic?," *Polar Journal* (2008)
- "The Arctic: A Unique Ecosystem," *WWF Arctic Programme* (2009)
- "The Impact of Climate Change on Arctic Animals", *Conservation Biology* (2010)
- "Polar Bear Conservation in Norway: A Success Story," *The IUCN Polar Bear Specialist Group* (2011)
- "The Future of Arctic Sea Ice: Implications for Polar Bears," *Science Advances* (2021)
Other Contributions
- "The Arctic Sea Ice Project," *BBC Earth* (2012), documentary film producer
- "Expedition Arctic," *Polar Quest* (2013), expedition leader and photographer
- "The Polar Bears of Svalbard," *National Geographic* (2015), magazine feature article
- "Arctic Explorer: A Lifetime in the Arctic," *Arctic Circle Magazine* (2016), interview