The Call of the Wild, published in 1903, remains London’s most famous work, blending his experiences as a gold prospector in the Canadian wilderness with his ideas about nature and the struggle for existence. He drew these ideas from various influential figures, including Charles Darwin, an English naturalist credited with developing theories about biological evolution, and Friedrich Nietzsche, a prominent German philosopher. Although The Call of the Wild is first a story about a dog, it displays a philosophical depth absent in most animal adventures.
Spark Notes Editors. “SparkNote on The Call of the Wild.” SparkNotes LLC. 2003. http://www.sparknotes.com/lit/call/ (accessed July 11, 2014).
you can read and listen to it at the same time