From the bio at his website :
Sam Harris is the author of the international bestseller, The End of Faith: Religion, Terror, and the Future of Reason. He is a graduate in philosophy from Stanford University and has studied both Eastern and Western religious traditions, along with a variety of spiritual disciplines, for twenty years. Mr. Harris is now completing a doctorate in neuroscience, studying the neural basis of belief, disbelief, and uncertainty with functional magnetic resonance imaging (fMRI). His work has been discussed in The New York Times, The Los Angeles Times, The San Francisco Chronicle, The Chicago Tribune, The Economist, The Guardian, The Independent, The Globe and Mail, The Toronto Star, and many other journals. Mr. Harris makes regular appearances on television and radio to discuss the risks that religion now poses to modern societies. The End of Faith won the 2005 PEN Award for Nonfiction. Several foreign editions are in press.
On October 6th, 2005, Harris wrote a piece in the Huffington Post group blog entitled There is No God (And You Know It)  which is excerpted from an upcoming piece at the new Truthdig web magazine  titled An Atheist Manifesto.
Harris has also been interviewed extensively in the Raving Atheist blog .