Richard Dawkins took on God in his last book, The God Delusion. His latest work has a slightly smaller, if closely related target.

The Greatest Show on Earth sums up the evidence for the fact of evolution.

Of course Dawkins the atheist would say God is no target at all. In The God Delusion he had religious believers in his sights, and he's now on the offensive against a significant subsection of them - those who promote creationism or so-called 'Intelligent Design'.

No doubt he'll be as uncompromising, provocative and controversial as always when he speaks at Sydney Opera House at 2pm this Sunday, March 7.

If you can't be there you can watch live on the The Sydney Morning Herald website here: http://bit.ly/dawkinssoh (but don't try the link until Sunday because it won't work until then).