The collection "Blockade Diaries and Documents" from the series "Archive of the Big House" for the first time comprehensively presents materials of personal origin from the archive of the FSB of Russia in St. Petersburg and the Leningrad Region related to the period of the blockade of Leningrad. One of the most important features of the collection is that the published diaries contain many political assessments, they contain notes by investigators of the NKVD LO, giving the reader an idea of ​ ​ the norm that existed in wartime regarding what the state security agencies considered "anti-Soviet."