The collection is dedicated to the memory of the outstanding Russian scientist, a major specialist in the history of the blocked Leningrad and the Great Patriotic War, Valentin Mikhailovich Kovalchuk (1916-2013). The book presents articles and documentary publications on various problems of the Great Patriotic War and World War II, but mainly on the history of the blockade and defense of Leningrad. Special sections of the collection are memories of the scientist, as well as the publication of the article by V. M. Kovalchuk and G. L. Sobolev "Leningrad Requiem," which caused a political resonance in Soviet times, and a number of documents telling about the continuation and completion of this story.