Holy War: How Vasco da Gama’s Epic Voyages Turned the Tide in a Centuries-Old Clash of Civilizations by Nigel Cliff; 560 pages, Harper; www.harpercollins.com. Also on amazon.com:
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The Great Sea: A Human History of the Mediterranean by David Abulafia; 860 pages, Oxford University Press; www.oup.com/us/. Also on amazon.com: