| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? |
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| Über historischen Materialismus, ein Quellenbuch | | 1930 | Author |  |  |  | | |
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| Capital: the Communist manifesto and other writings | | 1932 | Author | | | | | |
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| Das Kapital: Kritik der politischen Ökonomie | | 1929 | Author | | |  | | |
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| Der briefweschael zwischen Friedrich Engels und Karl Marx, 1844 bis 1883 | | 1913 | Author | | | | | |    
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| The essentials of Marx: the communist manifesto | | 1926 | Author | | | | | |
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| Extracts from the Capital of Karl Marx | | 1875 | Author | | | | | |
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| Free Trade: An Address Delivered Before the Democratic Association of Brussels, Belgium, January 9, 1848 | | 1921 | Author | | | | | |
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| Karl Marx: an essay | | 1933 | Author | | | | | |
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| Karl Marx and Marxism : a universal genius, his discoveries, his traducers | | 1933 | Author | | | | | |
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| Kommunistinen Manifesti | | 1914 | Author | | | | | |
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| Komunisticni Manifest | | 1908 | Author |  | | | | |
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| La revolución española (1808-1814, 1820-1823 y 1840-1843) nota del Instituto Marx y Engels, de Moscú | | 1929 | Author |  | | | | |
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| "Les grands textes du marxisme" sur la littérature et l'art ... | | 1936 | Author |  | | | | |
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| Manifesto of the Communist party | | 1933 | Author | | | | | |
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| Manifesto of the Communist Party | | 1908 | Author | | | | | |
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| Morceaux choisis | | 1934 | Author | | | | | |
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| The Paris commune: including the "First manifesto of the International on the Franco-Prussian war," the "Second manifesto of the international on the Franco-Prussian war," "The civil war in France," | | 1902 | Author | | | | | |
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| Secret diplomatic history of the eighteenth century | | 1899 | Author | | | | | |
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| Wage-Labor and Capital | | 1946 | Author | | | | | |
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| What is Marxism? | | 1957 | Author | | | | | |
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Public Domain Books