| title | creator | language | description | tableOfContents | contributor | subject | created |
| On the Origin of Species by Means of Natural Selection
or the Preservation of Favoured Races in the Struggle for Life. (2nd edition) | Darwin, Charles, 1809-1882 | en | | | | Evolution (Biology); Natural selection | 2007-09-25 |
| California Romantic and Resourceful
A plea for the collection, preservation and diffusion of information relating to Pacific coast history | Davis, John Francis, 1859-1930 | en | | | | Argüello y Morago, María de la Concepción Marcela, d. 1857; California -- History | 2003-11-01 |
| Letters to Eugenia
or, a Preservative Against Religious Prejudices | Holbach, Paul Henri Thiry, baron d', 1723-1789 | en | | | Middleton, Anthony C. [Translator] | | 2010-02-14 |
| Our Vanishing Wild Life
Its Extermination and Preservation | Hornaday, William Temple, 1854-1937 | en | | | | Wildlife conservation -- United States; Game-laws -- United States | 2004-08-22 |
| The Voice
Its Production, Care and Preservation | Miller, Frank E. | en | | | Kobbé, Gustav, 1857-1918 [Contributor] | | 2010-01-04 |
| An Appeal to the British Nation on the Humanity and Policy of Forming a National Institution for the Preservation of Lives and Property from Shipwreck (1825) | Hillary, William, Sir, 1771-1847 | en | | | | Lifesaving -- Great Britain; Shipwrecks | 2008-11-24 |
| A Book for All Readers
An Aid to the Collection, Use, and Preservation of Books
and the Formation of Public and Private Libraries | Spofford, Ainsworth Rand, 1825-1908 | en | | | | Library science; Books | 2007-09-15 |
| A Lecture on the Preservation of Health | Garnett, Thomas, 1766-1802 | en | | | | | 2006-05-11 |