Listening In: Intercepting German Trench Communications in World War I by Ernest H. Hinrichs

Listening In: Intercepting German Trench Communications in World War I by Ernest H. Hinrichs is a primary source about a soldier involved in signals intelligence in world war one. This is probably the only source of its kind. He was German American. There's a nice introduction to the mechanics of picking up trench communications and the American units involved. There's also of course material on trench life. After the war he came home and criticized theTreaty of Versailles and supported Adolf Hitler's attempts to throw it out. Strangely there's no reference about what he thought after this second world war.

A fascinating look at an unknown topic.

Is available through Abebooks.