[1] Krüger's profile began to rise within the Nazi Party and in 1936 he was appointed to serve under Philipp Bouhler as ministerial leader of the Investigation Committee for the Protection of National Socialist Literature, a body that sought to ensure all published books conformed to Nazi ideology, with a special remit to examine books on economics.
Following his release Krüger had to find employment as a textiles sales representative due to his associations with the Nazi university system.
[2] Krüger and Herbert Böhme formed their own political party in 1949 although this group was quickly absorbed into the larger Deutsche Reichspartei.
From then on he concentrated much of his efforts on disseminating neo-Nazi propaganda, setting up his own journal, the Nationaler Buchdienst, in 1956 and adding a book club, Das Reich im Buch, the following year.
[2] He also became associated with Arthur Ehrhardt's Nation Europa journal and became a regularly featured writer,[2] whilst also maintaining contacts with the Naumann-Kreis.