Niall Ferguson; Simon Sebag Montefiore; John Loengard

Economic historian Niall Ferguson, author of "Civilization: The West and the Rest," provides context to the decreasing predominance of the West. Simon Sebag Montefiore describes how he approached writing a definitive history of the city of Jerusalem. Photographer John Loengard turns the camera on other important photographers of our age in his book, "Age of Silver: Encounters with Great Photographers."