| title | creator | language | description | tableOfContents | contributor | subject | created |
| Conditions of Existence as Affecting the Perpetuation of Living Beings | Huxley, Thomas Henry, 1825-1895 | en | | | | | 2001-11-01 |
| The Existence of God | Fénelon, François de Salignac de la Mothe-, 1651-1715 | en | | | Morley, Henry, 1822-1894 [Editor] | | 2004-02-01 |
| Vestiges of the Mayas
or, Facts Tending to Prove that Communications and Intimate
Relations Must Have Existed, in very Remote Times, Between
the Inhabitants of Mayab and Those of Asia and Africa | Le Plongeon, Augustus, 1826-1908 | en | | | | Mayas; Indians -- Origin; Yucatán Peninsula -- Antiquities | 2009-12-25 |