The God Delusion is a 2006 best-selling, non-fiction book by English biologist Richard Dawkins, professorial fellow of New College, Oxford, and former holder of the Charles Simonyi Chair for the Public Understanding of Science at the University of Oxford
As of January 2010, the English version of The God Delusion had sold over 2 million copies. It was ranked No.2 on the Amazon.com best-sellers' list in November 2006. In early December 2006, it reached No.4 in the New York Times Hardcover Nonfiction Best Seller list after nine weeks on the list. It remained on the list for 51 weeks until 30 September 2007. The German version, entitled Der Gotteswahn, had sold over 260,000 copies as of 28 January 2010.