Moren published his first poetry collection, Vers, in 1895. His next collection, Hildring came in 1897. His story Paa villstraa was published in 1898.[2] His literary breakthrough was the story Storskogen from 1904.[1] The book is framed around a traditional love story between a boy from a cotter's family and a girl from a large farm. It treats various aspects from the old rural society, mixed with modern forestry and trade fluctuations, over-population and class distinction.[3] In 1907 he published Svartelva, a book with lyrical nature descriptions.[3] In 1909 he published the children's book Den store tømmerdrifta. In 1915 he published the children's book Dei morlause gutane i Skardfjellet and the play Vaarflaumen.[2] Among Moren's other novels were Garden og bygda from 1924, Grøndalskongen from 1925, and Vegaskile from 1926.[1] His novel series Styrkeprøve (1929), Riket er ditt (1932) and Skuldmennene (1934) treats conflicts between forest workers and forest owners.[3] He chaired the organization Norsk Bokmannslag from 1913 to 1917, and was a member of the literary council of the Norwegian Authors' Union from 1915 to 1928.[1]
He chaired the organization Noregs Ungdomslag for two periods.[1] He became a popular speaker of national fame, through his appearances at the large gatherings of this society.[3] He was a member of the school board and the municipal council of Trysil Municipality, initiated a local museum, and was a proponent for extending the railway to Trysil.[2] He was fielded as the Liberal Party's running mate to S. Nergaard in the 1915 Norwegian parliamentary election, but ended in last place.[4] The same thing happened in the 1918 general election.[5]
