▁D ag ▁for ▁a ▁second ▁period ▁in ▁ 1 9 2 4 . ▁He ▁then ▁edited ▁Te lem ark ▁Kommun ist bl ad , ▁as ▁Br ats berg - D em ok r aten ▁now ▁was ▁named , ▁from ▁ 1 9 2 5 ▁to ▁ 1 9 2 8 . ▁He ▁was ▁then ▁the ▁manager ▁in ▁Tr ond heim ▁from ▁ 1 9 2 8 ▁to ▁ 1 9 3 0 . ▁In ▁ 1 9 3 0 ▁he ▁was ▁ex cluded ▁from ▁the ▁Commun ist ▁Party , ▁and ▁he ▁eventually ▁rejo ined ▁the ▁Labour ▁Party . ▁ ▁Re iers en ▁was ▁occupied ▁from ▁ 1 9 3 3 ▁to ▁ 1 9 3 4 ▁with ▁writing ▁bi ograph ies ▁for ▁the ▁workers ' ▁en cyc lopedia ▁Arbe id ern es ▁Le ks ikon . ▁He ▁had ▁earlier ▁written ▁both ▁non - f iction ▁as ▁well ▁as ▁short ▁stories . ▁Many ▁short ▁stories ▁were ▁printed ▁in ▁newsp apers , ▁and ▁a ▁short ▁stories ▁collection ▁named ▁K amp ▁(" Str ug gle ") ▁was ▁released ▁in ▁ 1 9 1 7 . ▁In ▁ 1 9 4 0 ▁he ▁served ▁as ▁editor ▁of ▁R j uk an ▁Arbe ider bl ad ▁for ▁nine ▁months ▁before ▁the ▁newspaper ▁was ▁shut ▁down ▁during ▁the ▁occupation ▁of ▁Norway ▁by ▁Naz i ▁Germany . ▁He ▁was ▁also ▁imprison ed ▁in ▁M ø ll erg ata ▁ 1 9 ▁from ▁ 2 2 ▁January ▁to ▁ 8 ▁February ▁ 1 9 4 5 , ▁then ▁in ▁Gr ini