This dazzling book takes us on a voyage of discovery around the world at the turn of the last millennium, when for the first time the world was in essence a unity. Islam bridged Eurasia, western Europe, and North Africa. Vikings, with links to Scandinavia and Russia, had just arrived in North America. These and other peoples reached out to create links and put isolated cultures unwittingly in touch. John Man vividly captures these epochal events,...