The book publishes declassified materials about the activities of state security agencies in the days of the battle for Moscow. From the first months of the great Patriotic war, the KGB was able to solve specific tasks to ensure the regime of the military — and later the siege, the situation in the capital, the organization of protection areas major businesses, masking the Kremlin, the preparation of mining objects of the Kremlin and the destruction of industrial enterprises in case of approach of the enemy to Moscow, the evacuation of the capital of the state values and relics. In the center of attention of the chekists was the organization of intelligence and sabotage stations and partisan detachments.The collection publishes unique materials about the work of counterintelligence, the security service that provided security for the government of the USSR, foreign delegations, and the historical parade on November 7, 1941.