 He wrote fiction with the Scandinavian type of troll, as in Ibsen & Grieg's Peer Gynt and In the Hall of the Mountain King, or the trolls of John Bauer.He began his career as a highly active science fiction fan, co-editing "Science Fiction Forum" with John-Henri Holmberg and Mats Linder in the 1960s, and later by himself in the 1990s.He also contributed many short stories and articles to Swedish science fiction fanzines, and was Guest of Honor at several national science fiction conventions.