"Darkness" by Lord George Gordon Byron
http://www.poetryfoundation.org/poem/173081
The text of a poem with similar themes and some similar language to The Road.
Journal Storage
A digital library of academic papers, invaluable for finding literary criticism on any text.
Wikipedia List of Post-Apocalyptic and Apocalyptic Works
http://en.wikipedia.org/wiki/List_of_apocalyptic_and_post-apocalyptic_fiction
A great starting point for those interested in seeking out more stories about the apocalypse.
Major Religions on the End of the World
http://www.history.com/topics/the-end-of-the-world
A good place to start if you want to learn more...