Thorbjørn Egners lesebøker
... that Thorbjørn Egners lesebøker, a series of readers for the Norwegian primary school, took the author 25 years to complete, but were made largely obsolete the year the last book was published?
... that <i id="mwMA"><b id="mwMQ"><a href="./Thorbjørn_Egners_lesebøker" id="mwMg" rel="mw:WikiLink" title="Thorbjørn Egners lesebøker">Thorbjørn Egners lesebøker</a></b></i>, a series of <a href="./Basal_reader" id="mwMw" rel="mw:WikiLink" title="Basal reader">readers</a> for the <a href="./Norway" id="mwNA" rel="mw:WikiLink" title="Norway">Norwegian</a> <a href="./Primary_school" id="mwNQ" rel="mw:WikiLink" title="Primary school">primary school</a>, took the author 25 years to complete, but were made largely obsolete the year the last book was published?