| Coral Reefs | English | June 1, 2001 |
| Coral Reefs; Volcanic Islands; South American Geology — Complete | English | May 1, 2003 |
| De l'origine des espèces | French | November 26, 2004 |
| Geological Observations on South America | English | January 1, 2003 |
| Insectivorous Plants | English | May 1, 2004 |
| Journal of Researches into the Natural History and Geology of the Countries Visited During the Voyage Round the World of H.M.S. Beagle Under the Command of Captain Fitz Roy, R.N. | English | February 1, 2003 |
| Life and Letters of Charles Darwin — Volume 1 | English | February 1, 2000 |
| Life and Letters of Charles Darwin — Volume 2 | English | February 1, 2000 |
| More Letters of Charles Darwin — Volume 1: A Record of His Work in a Series of Hitherto Unpublished Letters | English | July 1, 2001 |
| More Letters of Charles Darwin — Volume 2: A Record of His Work in a Series of Hitherto Unpublished Letters | English | July 1, 2001 |
| Note on the Resemblances and Differences in the Structure and the Development of the Brain in Man and Apes | English | October 1, 2000 |
| Observations Géologiques sur les Îles Volcaniques Explorées par l'Expédition du "Beagle": Et Notes sur la Géologie de l'Australie et du Cap de Bonne-Espérance | French | February 1, 2006 |
| On the Origin of Species by Means of Natural Selection: or the Preservation of Favoured Races in the Struggle for Life. (2nd edition) | English | September 25, 2007 |
| On the Origin of Species By Means of Natural Selection: Or, the Preservation of Favoured Races in the Struggle for Life | English | March 1, 1998 |
| The Autobiography of Charles Darwin | English | December 1, 1999 |
| The Descent of Man, and Selection in Relation to Sex | English | August 1, 2000 |
| The Different Forms of Flowers on Plants of the Same Species | English | March 1, 2003 |
| The Effects of Cross & Self-Fertilisation in the Vegetable Kingdom | English | August 1, 2003 |
| The Expression of the Emotions in Man and Animals | English | March 1, 1998 |
| The Formation of Vegetable Mould Through the Action of Worms: With Observations on Their Habits | English | October 1, 2000 |
| The Foundations of the Origin of Species: Two Essays written in 1842 and 1844 | English | September 22, 2007 |
| The Movements and Habits of Climbing Plants | English | January 1, 2001 |
| The Origin of Species by Means of Natural Selection: Or, the Preservation of Favoured Races in the Struggle for Life, 6th Edition | English | December 1, 1999 |
| The Power of Movement in Plants | English | May 1, 2004 |
| The Variation of Animals and Plants under Domestication | English | July 1, 2002 |
| The Variation of Animals and Plants under Domestication — Volume 1 | English | October 1, 2001 |
| The Variation of Animals and Plants under Domestication — Volume 2 | English | October 1, 2001 |
| The Variation of Animals and Plants Under Domestication, Vol. I. | English | March 27, 2008 |
| The Voyage of the Beagle | English | June 1, 1997 |
| Volcanic Islands | English | February 1, 2002 |