If you've had your fill of books on atheism and secularism for the time being, you might check out Susan Jacoby's recently released "The Age of American Unreason." It attempts to put all recent anti-rationalist trends - evangelicalism, scientific backlash, "facts are just opinions," etc. - into historical perspective.
I can't comment it on it yet since I've only just ordered it, but I'm happy to provide a review after. Incidently, I did read Jacoby's last book, "Freethinkers: A History of American Secularism," which was thorough and engaging. I'm happy to loan it to anyone who'd like to read it.