This book, in the preparation of which archival documents of the domestic special services and the Russian State Archive of Socio-Political History (RGASPI) were used, will open several more previously closed pages from the activities of the domestic special services. It will allow you to learn new things about famous and unknown heroes. Most of them, despite adversity and personal tragedies, remained faithful to the oath, friends and until the last hour disinterestedly served their harsh homeland.