A. V. Lunacharsky: Lev Davidovich Trotsky (1923)
Louise Bryant: Leon Trotsky, Soviet War Lord (1922)
J. C. Mariategui:
Max Eastman: Leon Trotsky: The Portrait of a Youth 1925
Leon Trotsky: My Life (1930)
James P. Cannon: To the memory of the old man (obituary1940)
Pandelis Pouliopoulos: Trotsky: One of the Great Leaders of Marxism (study1941)
Gérard Rosenthal, Avocat de Trotsky: A Visit With Trotsky
Fritz Sternberg: Conversations with Trotsky (1934)