 In particular, war adventure books such as Werner von Langsdorff's "Fliegerbuch" on aviation were a commercial success.Heinrich Mohn belonged to the patrons' circle of the SS and sought to turn his company into a National Socialist model enterprise.During World War II, the C. Bertelsmann Verlag became a leading supplier to the Wehrmacht, even surpassing the central publishing house of the NSDAP Franz Eher.