Online
- Works by Arthur Schopenhauer at Project Gutenberg
- Illustrated version of the "Art of Being Right" and links to logic and sophisms used by the stratagems.
- The Art Of Controversy (Die Kunst, Recht zu behalten). (bilingual)
- Studies in Pessimism - audiobook from LibriVox.
- The World as Will and Idea at Internet Archive:
- Volume I;
- Volume II;
- Volume III.
- On the fourfold root of the principle of sufficient reason and On the will in nature. Two essays:
- Internet Archive. Translated by Mrs. Karl Hillebrand (1903).
- Cornell University Library Historical Monographs Collection. Reprinted by Cornell University Library Digital Collections
- Facsimile edition of Schopenhauer's manuscripts in SchopenhauerSource
- Essays of Schopenhauer
Read more about this topic: Arthur Schopenhauer, Selected Bibliography