In the 20th century, three Norwegian novelists were awarded the Nobel Prize in Literature: Bjørnstjerne Bjørnson in 1903, Knut Hamsun for the book ''Markens grøde'' ("Growth of the Soil") in 1920, and Sigrid Undset (known for ''Kristinlavransdatter'') in 1928. Writers such as the following also made important contributions: Dag Solstad, Jon Fosse, Cora Sandel, Olav Duun, Olav H. Hauge, Gunvor Hofmo, Stein Mehren, Kjell Askildsen, Hans Herbjørnsrud, Aksel Sandemose, Bergljot Hobæk Haff, Jostein Gaarder, Erik Fosnes Hansen, Jens Bjørneboe, Kjartan Fløgstad, Lars Saabye Christensen, Johan Borgen, Herbjørg Wassmo, Jan Erik Vold, Rolf Jacobsen, Olaf Bull, Jan Kjærstad, Georg Johannesen, Tarjei Vesaas, Sigurd Hoel, Arnulf Øverland, Karl Ove Knausgård and Johan Falkberget.