Cover Name: Dr. Rantzau

Through a personal diary format, this memoir offers a rare insider's perspective on espionage during World War II from an ex-Abwehr officer. Colonel Nikolaus Ritter, after a stint in business in America, became Chief of Air Intelligence, tasked with establishing a network to gather critical intelligence on Allied air capabilities. His covert operations included smuggling key American technologies into Germany and planning military strategies. The account, translated by his daughter Katharine Ritter Wallace, combines personal notes and documents, providing an engaging look at intelligence operations of the era.