| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| Tractatus Logico-Philosophicus | Wittgenstein, Ludwig, 1889-1951 | en | Logic, Symbolic and mathematical; Language and languages -- Philosophy | 2004-05-01 | |||
| The Theological Tractates and The Consolation of Philosophy | Boethius, Anicius Manlius Severinus, 480-525? | Happiness; Theology -- Early works to 1800; Theology -- History -- Early Church, ca. 30-600; Philosophy and religion | 2004-08-29 |