Ranked one of the best books on OSS spy training :

              Trained to be an OSS Spy                                                 

                                

Trained to be an OSS Spy  —  Spy Story Audiobooks. "One of the best espionage and spy training OSS spy training audiobooks in its genre." best espionage spy training audiobook, best OSS spy training audiobook about OSS Secret Intelligence and Special Operations. The best audiobook on espionage and OSS spy training.