Cultures in Conflict: Christians, Muslims, and Jews in the Age of DiscoveryHailed as the doyen of Middle Eastern studies in The New York Times Book Review, Bernard Lewis stands at the height of his field. To read Mr. Lewis, wrote Fouad Ajami in The Wall Street Journal, is to be taken through a treacherous terrain by the coolest and most reassuring of guides. You are in the hands of the Islamic world's foremost living historian. Now this sure handed guide takes us through treacherous terrain indeed the events of 1492, a year