The monograph is dedicated to the relations of the prominent figure of the Russian Social Democratic and then the communist movement Lev Davidovich Trotsky with D. Blagoev, V. Kolarov, G. Dimitrov, Ya. Sakazov and especially with K. Rakovski until 1917, to Trotsky's contacts with the Bulgarian communists during the period when he became one of the leaders of Soviet Russia, and then began to fight against the growing autocracy of I. V. Stalin, by organizing opposition groups. The book pays considerable attention to Trotsky's contacts with his Bulgarian sympathizers in the 1930s, especially with S. Manov and D. Gachev. The book is in Russian.