In 1772 he posthumously published Reise igiennem Island (Travels in Iceland), an account of the scientific and cultural survey he conducted between 1752 and 1757. The book remains a seminal work on Iceland and its people.
In 1772, he published "Travels in Iceland" (Reise igiennem Island), which documented his scientific and cultural exploration of Iceland between 1752 and 1757. The book remains a cornerstone text on Iceland and its people.