| 1900 | The Municipality from Capitalism to Socialism✓Free The Making of the Modern World, Part II: 1851-1914 | Ernest Untermann | Appeal to Reason | English |
| 1901 | Karl Marx✓Free — Biographical Memoirs Standard Socialist Series | Wilhelm Liebknecht | Charles H. Kerr & Company | English |
| 1902 | The Municipality from Capitalism to Socialism✓Free | Ernest Untermann | Appeal to Reason | English |
| 1902 | The Origin of the Family, Private Property and the State✓Free Standard Socialist Series | Friedrich Engels | Charles H. Kerr & Company | English |
| 1903 | Socialism vs. Single Tax✓ — A Verbatim Report of a Debate Held at Twelfth Street, Turner Hall, Chicago, December 20th, 1905 | Ernest Untermann & Louis F. Post | Charles H. Kerr & Company | English |
| 1905 | Science and Revolution✓Free Library of Science for the Workers | Ernest Untermann | Charles H. Kerr & Company | English |
| 1906 | Capital✓Free — A Critique of Political Economy | Karl Marx | Charles H. Kerr & Company | English |
| 1906 | Some of the Philosophical Essays on Socialism and Science, Religion, Ethics, Critique-of-reason and the World-at-large✓Free International Library of Social Science | Joseph Dietzgen | Charles H. Kerr & Company | English |
| 1906 | The Making of the World✓Free | M. W. Meyer | Charles H. Kerr & Company | English |
| 1906 | The Positive Outcome of Philosophy✓Free — The Nature of Human Brain Work. Letters on Logic. The Positive Outcome of Philosophy. Translated by Ernest Untermann. With an Introd. By Anton Pannekoek. Edited by Eugene Dietzgen and Joseph Dietzgen, Jr International Library of Social Science | Joseph Dietzgen | Charles H. Kerr & Company | English |
| 1906 | The Positive School of Criminology✓Free — Three Lectures Given at the University of Naples, Italy, on April 22, 23, and 24, 1901 Standard Socialist Series | Enrico Ferri | Charles H. Kerr & Company | English |
| 1906 | The Process of Capitalist Production Capital: A Critique of Political Economy | Karl Marx, Samuel Moore, Edward Bibbins Aveling, Friedrich Engels & Ernest Untermann | Charles H. Kerr & Company | English |
| 1906 | The World Revolutions | Ernest Untermann | Charles H. Kerr & Company | English |
| 1906 | The World's Revolutions✓Free Standard Socialist Series | Ernest Untermann | Charles H. Kerr & Company | English |
| 1907 | Capital✓Free — A Critique of Political Economy | Karl Marx | Charles H. Kerr & Company | English |
| 1907 | Dialektisches✓Free — Volkstümliche Vorträge aus dem Gebiete des proletarischen Monismus | Ernest Untermann | J. H. W. Dietz Verlag | German |
| 1907 | Dialektisches. Volkstümliche Vorträge aus dem Gebiete des proletarischen Monismus, von Ernst Untermann✓Free | Gerhard Ernest Untermann | J. H. W. Dietz Verlag | German |
| 1907 | Marxian Economics✓Free — A Popular Introduction to the Three Volumes of Marx's "Capital" | Ernest Untermann | Charles H. Kerr & Company | English |
| 1907 | Marxian Economics: A Popular Introduction to the Three Volumes of Marx's ...Free | Ernest Untermann | Charles H. Kerr & Company | English |
| 1907 | Socialism and Philosophy✓Free International Library of Social Science | Antonio Labriola | Charles H. Kerr & Company | English |
| 1907 | The Evolution of Man✓Free | Wilhelm Bölsche | Charles H. Kerr & Company | English |
| 1907 | The Process of Circulation of Capital Capital: A Critique of Political Economy | Karl Marx, Friedrich Engels & Ernest Untermann | Charles H. Kerr & Company | English |
| 1908 | Karl Marx✓Free — Biographical Memoirs ... Standard Socialist Series | Wilhelm Liebknecht | Charles H. Kerr & Company | English |
| 1908 | The Positive Outcome of Philosophy✓Free — The Nature of Human Brain Work; Letters on Logic; the Positive Outcome of Philosophy International Library of Social Science | Joseph Dietzgen, Eugene Dietzgen & Dietzgen, Joseph, jr | Charles H. Kerr & Company | English, German |
| 1909 | The Origin of the Family, Private Property and the State✓Free Standard Socialist Series | Friedrich Engels | Charles H. Kerr & Company | English |
| 1909 | The World's Revolutions✓Free Standard Socialist Series | Ernest Untermann | Charles H. Kerr & Company | English |
| 1910 | Science and Revolution✓Free | Ernest Untermann | Charles H. Kerr & Company | English |
| 1910 | The Positive School of Criminology✓Free — Three Lectures Given at the University of Naples, Italy on April 22, 23 and 24, 1901 | Enrico Ferri | Charles H. Kerr & Company | English |
| 1913 | Marxian Economics✓Free — A Popular Introduction to the Three Volumes of Marx's, "Capital" | Ernest Untermann | Charles H. Kerr & Company | English |
| 1913 | The Positive School of Criminology✓Free — Three Lectures Given at the University of Naples, Italy, on April 22, 23 and 24, 1901 | Enrico Ferri | Charles H. Kerr & Company | English |
| 1914 | Science and Revolution✓Free | Ernest Untermann | Charles H. Kerr & Company | English |
| 1920 | Science and Revolution✓Free | Ernest Untermann | Charles H. Kerr & Company | English |
| 1925 | マルクス経済学✓ | Ernest Untermann & 均 山川 | Hakuyōsha | Japanese |
| 1927 | Marxian Economics✓Free — A Popular Introduction to the Three Volumes of Marx's "Capital" | Ernest Untermann | Charles H. Kerr & Company | English |
| 1927 | マルクス經濟學✓ | Ernest Untermann & 均 山川 | Hakuyōsha | Japanese |
| 1928 | The Positive Outcome of Philosophy✓Free — The Nature of Human Brain-Work. Letters on Logic. The Positive Outcome of Philosophy | Joseph Dietzgen | Charles H. Kerr & Company | English |
| 1930 | マルクス経済学: 改訳✓ | Ernest Untermann & 均 山川 | Hakuyōsha | Japanese |
| 1934 | Socialism and Philosophy✓Free | Antonio Labriola & Fredric Wertham Collection (Library of Congress) | Charles H. Kerr & Company | English |
| 1974 | The Origin of the Family, Private Property, and the State✓Free Woman's Rights -- No. 237 | Friedrich Engels | Charles H. Kerr & Company | English |