This very slim monograph on the Hermetic cult was, I think, significant to the Edelsteins' working thesis that the (Judaic) Therapeutae wrote or assimilated certain books of the Corpus Hermetica. This foundation is extraordinary, quite radical but necessary to explain the development of their synthetic gnosis -- a melding of the Philonica with the Hermetica to re-imagine or re-create an archetypal pattern/therapeusis for First C. Alexandrian soul-healing (i.e. metanoia/metempsychosis). Undergirding the Edelsteins' program of recovery are syncretistic theories of Bousset, Norden, Lewy and Bräuninger.
On Friedrich Carl Albert Bräuninger (1901-1945), little is known about him except that he was a Nazi Librarian less than a decade after he wrote his PhD. See J.-P. Barbian's The Politics of Literature in Nazi Germany [2013], p.1932 :
The German Army Library in Berlin, founded in 1919, initially supervised seven military district libraries.358 But from 1935 the Wehrmacht's library network burgeoned along with rearmament, and by 1942 it included seventeen district libraries. In addition to the central library in Berlin, branches in Vienna and Prague were established in 1940. The Army Library and military district libraries possessed not only large holdings and considerable funding for new acquisitions, but also qualified staff—the Berlin headquarters alone had twenty-four trained librarians in 1942. Until 1940, the director of the German Army Library was also the Reichswehr Ministry's specialist on army libraries. From 1941 the Ministry had a separate office for the “Chief of the Army Libraries,” accounting at first to the Army General Staff and from July 1942 to the “Führer's commissioner for the writing of military history”. The office was headed by a member of the military, but its substantive work was carried out by a research librarian, Friedrich Bräuninger, right up to 1945.