Edsel describes Wolff 's harrowing negotiations with OSS leader Allen Dulles related to the artworks and preserving Paris after the Nazis ' retreat .
OSS leader Allen Dulles is america 's senior spy in Europe .
Edsel describes Wolff 's harrowing negotiations with OSS leader Allen Dulles , America 's senior spy in Europe , related to the artworks and preserving Paris after the Nazis ' retreat .