Origin of Species
http://http://www.talkorigins.org/faqs/origin.html
A link to the entire text of Origin of Species
Darwin Online
http://darwin-online.org.uk/EditorialIntroductions/Freeman_OntheOriginofSpecies.html
Discusses the publication history of Origin of species as well as the variations in different editions.
Reaction to Origin of Species
http://en.wikipedia.org/wiki/Reactions_to_On_the_Origin_of_Species
Covers the public reaction in the year after it's publication.
On The Origin of Species
http://en.wikipedia.org/wiki/On_the_Origin_of_Species#External_links
Wikipedia entry on The Origin of Species
Gutenberg College Great Books
http://msc.gutenberg.edu/2001/02/a-review-of-darwins-the-origin-of-species/
A review of Origin of Species from a Christian perspective.
The Wild Nature Blog
http://martynmurray.wordpress.com/2011/06/01/charles-darwins-on-the-origin-of-species-1st-ed-1859/
An introduction to Origin of Species from naturalist Martyn Murray.
Darwin On the Origin of Species
A review from 1860 by Asa Grey.
In the news: Was Darwin Racist
http://http://www.apologeticspress.org/apcontent.aspx?category=9&article=4028
An essay looking into this question.
