Of all the spokesmen for godlessness to emerge during 2007, the "year of the atheist," Christopher Hitchens is perhaps the most prominent. He is a prolific journalist and television pundit, selected by voters in Prospect magazine's 2008 poll as the #5 most important public intellectual. His 2007 treatise, God Is Not Great: How Religion Poisons Everything, continues to sell briskly, and he has built a sideline career debating any willing opponent from any church or creed, from Al Sharpton to Dinesh D'Souza. There is one man, however, who has sparred with Hitchens more than anyone: a relatively unknown Idaho pastor...