The heroes of the book are fighters of the “invisible front” and their assistants, materials about which were only recently declassified by foreign intelligence. Alexey Botyan, the prototype of the famous Major Whirlwind, the true savior of Krakow, during the Great Patriotic War, commanded a unit of the Olympus special forces detachment, operating behind enemy lines. Then he worked for about forty years in Soviet foreign intelligence. Walter Stennes was once a friend of Hitler, Goebbels, and Goering. But a painful political epiphany led him to cooperate with Soviet intelligence under the operational pseudonym “Friend.” Well, the introduction to the secrets of the intelligence profession was organized for the author in the course of numerous conversations by Markus Wolf himself, the “genius of espionage,” as he was called in the West. The reader will learn about them, as well as many other remarkable intelligence officers, from this book. Its author, an international journalist, worked in many countries around the world as his own and as a special correspondent for leading Soviet and Russian newspapers.…