CHICAGO (Reuters) - 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," No. 11 on the New York Times nonfiction list on October 15. 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 in an interview. Religious polarization...