The huge play, written in Norwegian nynorsk, which covers various genres, has plays, novels, poetry, essays, children's books and translations. Today he is one of the most theatrical dramatists in the world, but he has been increasingly recognized for his prose.
Jon Foss writes to the Norwegian in nynorski. According to Wikipedia, “it is the news and less used of the two Norwegian writing standards: About 12% of the Norwegian population uses it,” and has about 600,000 speakers.