Major works by Marx and Engels Theses on Feuerbach (1845)The German Ideology (1847)Principles of Communism (1847)The Communist Manifesto (1848)Wage-Labor and Capital (1849)A Contribution to the Critique of Political Economy (1859)Capital, Volume 1 (1867)The Civil War in France (1871)Critique of the Gotha Program (1875)Socialism: Utopian and Scientific (1880)Ludwig Feuerbach (1886) Here's what LibriVox.org has YES - Theses on Feuerbach (1845)NO - The German Ideology (1847)NO - Principles of Communism (1847)YES - The Communist Manifesto (1848)YES - Wage-Labor and Capital (1849)NO - A Contribution to the Critique of Political Economy (1859)YES - Capital, Volume 1 (1867)NO - The Civil War in France (1871)NO - Critique of the Gotha Program (1875)YES - Socialism: Utopian and Scientific (1880)NO - Ludwig Feuerbach (1886) So to break down what needs doing Preface - The German IdeologyChapter 1 - The German IdeologyChapter 2 - The German IdeologyChapter 3 - The German IdeologyChapter 4 - The German IdeologyPrinciples of CommunismPreface - A Contribution to the Critique of Political Economy (1859)Chapter 1 - A Contribution to the Critique of Political Economy (1859)Chapter 2 - A Contribution to the Critique of Political Economy (1859)Appendices - A Contribution to the Critique of Political Economy (1859)Introduction - The Civil War in France (1871)Chapter 1 - The Civil War in France (1871)Chapter 2 - The Civil War in France (1871)Chapter 3 - The Civil War in France (1871)Chapter 4 - The Civil War in France (1871)Chapter 5 - The Civil War in France (1871)Chapter 6 - The Civil War in France (1871)Appendices - The Civil War in France (1871)Foreword - Critique of the Gotha Program (1875)Chapter 1 - Critique of the Gotha Program (1875)Chapter 2 - Critique of the Gotha Program (1875)Chapter 3 - Critique of the Gotha Program (1875)Chapter 4 - Critique of the Gotha Program (1875)Appendix - Critique of the Gotha Program (1875)Foreword - Ludwig Feuerbach (1886)Chapter 1 - Ludwig Feuerbach (1886)Chapter 2 - Ludwig Feuerbach (1886)Chapter 3 - Ludwig Feuerbach (1886)Chapter 4 - Ludwig Feuerbach (1886) By the way on minor works, The Condition of the Working-Class in England (1844) is already completed.