The Return of the Dark Invader

Follow-up to the 1933 publication The Dark Invader, an autobiographical account of Captain von Rintelen's experiences as a sabotage agent in the United States of America during World War I. Rintelen had been the chief figure in that work, which had ramifications and results far beyond the knowledge of the general public, and which had been as dangerous a task as any entrusted to a man during the War.
The War ended in 1918, but it was not until 1921 that Rintelen was freed. He returned to G...