A review of the book “Leonid Kogan. Letters” is based on the study of Russian-language publications dedicated to the great violinist. In creating his life and work chronicle, the leading role belongs to E. G. Gilels, V. Yu. Grigoriev, N. L. Kogan, and among the published sources, his small but valuable literary heritage is especially significant, revealing the indivisibility of the facets of human and artistic personality. The addition in the new book of quotations from articles and interviews with L. Kogan and from memoirs about him enriches the epistolary genre, helping the reader to see a multifaceted and live portrait of Leonid Borisovich in the mirror of letters. L. Kogan’s correspondence reveals, along with new facts about his activities, the professional, intellectual, and psycho­logical traits of many famous musicians and artists, managers, scientists, and high-ranking persons. It is replete with different styles of statements and formats and at the same time, it is possible to introduce part of the corpus of letters into scientific use.