He did write several other books, though, many of which did touch upon subjects such as society and thoughts about modern life, etc. Here is a quote from the book "Growth of the Soil", where a character makes it quite clear what he feels is important in life:
"Look at you folk at Sellanraa, now; looking up at blue peaks every day of your lives; no new-fangled inventions about that, but fjeld and rocky peaks, rooted deep in the past — but you’ve them for companionship. There you are, living in touch with heaven and earth, one with them, one with all these wide, deep-rooted things. No need of a sword in your hands, you go through life bareheaded, barehanded, in the midst of a great kindliness. Look, Nature’s there, for you and yours to have and enjoy. Man and Nature don’t bombard each other, but agree; they don’t compete, race one against the other, but go together. There’s you Sellanraa folk, in all this, living there. Fjeld and forest, moors and meadow, and sky and stars — oh, ’tis not poor and sparingly counted out, but without measure. Listen to me, Sivert: you be content! You’ve everything to live on, everything to live for, everything to believe in; being born and bringing forth, you are the needful on earth. ’Tis not all that are so, but you are so; needful on earth. ’Tis you that maintain life."