Letter to a Christian Nation Sam Harris, Knopf, $16.95, 112 pages For those unaware of Sam Harris, his bestseller The End of Faith: Religion, Terror, and the Future of Reason established him as the American atheist laureate, the Yankee counterpart of the Brits' Richard Dawkins. Now comes the inevitable follow-up: Harris has composed a Letter to a Christian Nation for our edification. Harris is no H. L. Mencken. He is not even in Dawkins's league. But, I confess, I like him anyway. Unlike many of our culture's atheists who pretend to be friendly to religion -- and speak to...