Two seemingly unconnected events trigger off the discovery of nothing less than the secret of humanity's existence. Written in conjunction with author and senior NASA scientist Gentry Lee.

Cradle 2001, Orbit

ISBN-13: 9781857230727

Spanish

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Cradle 1990, Orbit, London

ISBN-13: 9780708883198

New edition

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Cradle 1989, Grand Central Publishing, New York, NY

ISBN-13: 9780446356015

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Cradle 1989, Futura

ISBN-13: 9780708843185

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Cradle 1988, Grand Central Publishing, New York, NY

ISBN-13: 9780446513791

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Cradle 1988, Victor Gollancz

ISBN-13: 9780575041646

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