The third volume of the Complete Works and Letters of Osip Mandelstam consisted of two sections. The first section includes prose - numerous reviews and prefaces that give a broad idea of Mandelstam the critic, notes on theater, cinema and other works from different years. The second section consists of all the poet’s letters from 1903–1938 known to date, statements and other documents of a biographical nature, a number of which are being published for the first time. The volume is accompanied by detailed comments.