The book offered to the attention of readers is dedicated to the 60th anniversary of the famous Battle of Kursk. In it, along with documents reflecting the activities of the already well-known researchers of the People's Commissariats of State Security and Internal Affairs, for the first time presented materials related to one of the most mysterious and incomparable services of that time - The main counterintelligence department "Smersh," which made a significant contribution not only to the successful struggle of domestic security agencies with the special services of Germany, but also to achieving a common victory over the insidious and cruel enemy in this war.