Drawing heavily on recently declassified sources, this examination of German wartime intelligence services traces the logistical and strategic expansion of the Third Reich's foreign covert operations in World War II.

Beginning with the changes introduced to counteract institutional neglect, the author describes attempts to penetrate both neutral and adversarial nations outside territories occupied by the Wehrmacht. The Nazis created covert teams for counterintelligence and penetrating border defenses. Strategies were formed for assembling saboteur divisions in North and South America, while data were gathered on industrial installations to target.

American fascist movements of the 1930s are discussed, along with Nazi sabotage missions in the United States and intelligence penetrations and domestic collusion in Latin America.