The publication of documents - information reviews and summaries of the OGPU - is unique in its scientific significance, value, content and scale. This historical source presents a wide panorama of the country's social, political and economic life in all its diversity. Much attention is paid primarily to the state and mood of society, the attitude of workers, peasants, intelligentsia, clergy to power. The history of forced collectivization in the countryside, the activities of various political parties, national movements in the republics, the state of the army, the position of the church, the resistance of workers to government measures, their struggle to improve living conditions are documented. The publication discloses the system and form of information developed by the OGPU, its level and main directions.