Three planned volumes, in the first of which articles, theses and notes by Kazimir Malevich, previously unknown theoretical texts of El Lisitsky; letters from Nina Kogan to Peter Miturich, Malevich, Vera Khlebnikova and other addressees; the diary of Mikhail Mityushin; unique materials related to Vitebsk and UNOVIS; the article by Alexei Ghana written specifically for the solo exhibition of Malevich in 1920; as well as other documents. Also photographs and drawings of KS. Malevich and other prominent representatives of Russian modernism.