About the book: year / The twenty-seventh volume of the Works of K. Marx and F. Engels opens a series of volumes, the contents of which consists of correspondence between the founders of Marxism, as well as their letters to various individuals. The first volume of correspondence covers letters that date back to the period preceding the bourgeois-democratic revolutions of 1848–1849. in European countries, to the period of the revolution itself and the first years after its defeat (from 1842 to 1851).