The book, which is one of the issues of the series "Classics of Russian Oriental Studies," includes the works of Academician B. Ya. Vladimirtsova (1884-1931) on the history and ethnography of Mongolian-speaking peoples, including Genghis Khan, Inscriptions on the rocks of the Khalkha Tsoktu-taiji, "" Social system of the Mongols. Mongolian nomadic feudalism," and others written by a scientist from 1909 to 1931. Put together, they give a complete idea of ​ ​ the breadth of scientific interests of an outstanding Russian scientist.