T. A. Heppenheimer's acclaimed chronicle of rockets, politics, and the pioneers who dared to reach beyond humanity's limits. "The most comprehensive, up-to-date, and best written history of space flight there is. "-The Times (London) "A lively account of the development of space activities in the U. S. and the Soviet Union ... as good a one-volume overview of space as exists. "-Scientific American. "Countdown is by far the best history of space flight I have ever read. It is detailed, lucidly written for the layman, and full of fascinating stories. -Adrian Berry, Daily Telegraph. "Science writer Heppenheimer's readable account provides a timely historical overview of the early visionaries, the engineers, and the geopolitical forces that placed men on the moon and created today's aerospace industry... A thoughtful analysis that is highly recommended. -Library Journal. "By far the most significant and technically insightful account of the ventures into the space environment I have seen... [Heppenheimer] concentrates unerringly on key elements, both technical and managerial, in this account of man's initial space ventures. "-Lee Atwood, Former president and chairman, North American Aviation Corporation. "Like a skilled artisan, Heppenheimer weaves social, political, scientific, technological, military, and economic threads of the history of space flight into a tapestry that reveals fascinating patterns and themes. "-Publishers Weekly