—— Socialism—Utopian and Scientific, 1892.
—— L. Feuerbach und der Ausgang der Klassischen Deutschen Philosophie, 1903.
—— Briefe und Auszüge von Briefen, 1906.
—— Friedrich Engels, Sein Leben, Sein Wirken und Seine Schriften, 1895.
Marx and Engels: The Communist Manifesto. There have been many editions; that of 1888 is probably the widest known for its historical Introduction.
Marx, Karl: The Poverty of Philosophy. An answer to Proudhon's La Philosophie de la Misère. An English translation was made by H. Quelch, 1900.
—— Enthüllungen über den Kommunisten Process zu Köln, 1875. Engels' Preface gives an account of the origin of the "Society of the Just."
—— Die Klassenkämpfe in Frankreich, 1848-50.
—— Revolution and Counter-Revolution in Germany in 1848. An English translation appeared in 1896.
—— Capital, 1896.