A fresh wave of atheistic books has hit the market this autumn, some climbing onto best-seller lists in what proponents see as a backlash against the way religion is entwined in politics.

?Religion is fragmenting the human community,? said Sam Harris, author of Letter to a Christian Nation. There is a ?huge visibility and political empowerment of religion. President George W. Bush uses his first veto to deny funding for stem cell research and scientists everywhere are horrified,? he said inan interview.

Religious polarization is part of many world conflicts, he said, including those involving Israel and Iran, ?but it?s never discussed. I consider it the story of our time, what religion is doing to us. But there are very few people calling a spade a spade.?

His Letter, a blunt 96-page pocket-sized book condensing arguments against belief in quick-fire volleys, appeared on the Times list just ahead of ?The God Delusion,? by Richard Dawkins, a scientist at Oxford University and long-time atheist.

In addition, Harris? ?The End of Faith,? a 2004 work which prompted his ?Letter? as a response to critics, is holding the No. 13 Times spot among nonfiction paperbacks.