German Concentration Camps -
https://archive.org/details/GermanConcentrationCamps
German Intelligence Activities -
https://archive.org/details/GermanIntelligenceActivities
German Intelligence Service (WW2) -
https://archive.org/details/GermanIntelligenceService
German Plans For Invasion Of England, 1940 -
https://archive.org/details/GermanPlansForInvasionOfEngland1940
Enjoy! More at http://that1archive.neocities.org/subfolder1/early-cia.html