S. A. Ermolinsky (1900–1984) is a famous screenwriter, theater playwright and writer. Based on his scripts, films were made that have rightfully entered the history of cinema: “The Earth is Thirsty”, “Katorga”, “Virgin Soil Upturned”, “The Road”, “The Elusive Avengers” and many others. etc. He is the author of a number of plays, the production of which was noted as an event in theatrical life: “Griboyedov”, “Testament” and “Unlike Youth”. But he himself considered prose to be the main work of his life, to which he devoted his last years, and above all the story-memoir “Mikhail Bulgakov”. They were close friends, despite the difference in age, and Sergei Alexandrovich carried this friendship throughout his life, serving her faithfully and faithfully, never giving up even in the most terrible circumstances. The book includes excerpts from the autobiographical story “Youth”, “Notes” about Mikhail Bulgakov,” including the second, unfinished part, which was not published during the author’s lifetime, “Prison and Exile. After death,” memories of friends. The appendix contains letters to M. A. Ermolinsky and E. S. Bulgakov, interrogation reports.