Taking a semester off to travel and focus on writing isn't that unusual for a student at Brown University. But instead of studying comparative literature in Europe, Kevin Roose decided to go to Lynchburg, Va., and enroll at Jerry Falwell's Liberty University. Roose passed himself off as an evangelical Christian to blend in with students at the school founded by the late Moral Majority leader. The experience led to a book, The Unlikely Disciple: A Sinner's Semester at America's Holiest University.