| title | creator | language | description | tableOfContents | contributor | subject | created |
| Timar's Two Worlds | Jókai, Mór, 1825-1904 | en | | | Kennard, Mrs. Hegan [Translator] | | 2010-02-26 |
| Life in a Thousand Worlds | Harris, W. S. (William Shuler), 1865- | en | | | | | 2005-01-23 |
| New Worlds For Old
A Plain Account of Modern Socialism | Wells, H. G. (Herbert George), 1866-1946 | en | | | | | 2009-11-24 |
| The Worlds of Joe Shannon | Robinson, Frank M., 1926- | en | | | Orban, Paul, 1896-1974 [Illustrator] | | 2010-06-04 |
| A Romance of Two Worlds | Corelli, Marie, 1855-1924 | en | | | | | 2003-08-01 |
| The Worlds of If | Weinbaum, Stanley Grauman, 1902-1935 | en | | | | Science fiction; Short stories | 2007-10-05 |
| The War of the Worlds | Wells, H. G. (Herbert George), 1866-1946 | en | | | | Science fiction; Martians -- Fiction; Mars (Planet) -- Fiction; Space warfare -- Fiction; War stories; Imaginary wars and battles -- Fiction | 2004-10-01 |
| Other Worlds
Their Nature, Possibilities and Habitability in the Light of the Latest Discoveries | Serviss, Garrett Putman, 1851-1929 | en | | | | | 2006-05-22 |
| A journey in other worlds
A romance of the future | Astor, John Jacob, 1864-1912 | en | | | | Manned space flight -- Fiction; Space ships -- Fiction; Jupiter (Planet) -- Fiction; Saturn (Planet) -- Fiction; Science fiction; Utopias -- Fiction | 1999-01-01 |