About the book: 1938 / Publisher's abstract: The book tells about the theft of the German diplomatic code, with the help of which English counterintelligence was able to decipher the notorious telegrams of the German government that was preparing the attack on the USA in the world war of 1914–1918, and about the activities of one of the French secret service agents. The book introduces the insidious techniques and methods of work of counterintelligence services of capitalist countries and in this regard is of certain interest to the Soviet reader.