Helicopter Man: Igor Sikorsky and His Amazing Invention (Genius at Work! Great Inventor Biographies)

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3rd Party Used from	$15.80

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	New		3rd Party New		3rd Party Used
Latest	$22.60	Latest	$15.80	Latest	$15.80
Highest	$23.94 Jan 2, '16	Highest	$23.23 Jan 15, '15	Highest	$99.31 Aug 21, '14
Lowest	$20.34 Jan 9, '14	Lowest	$10.99 Jul 8, '14	Lowest	$0.01 Jan 31, '16
Average	$22.69	Average	$16.44	Average	$10.67
Added	Jan 9, 2014	Added	Jan 9, 2014	Added	Jan 9, 2014

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Amazon Best Sellers Rank

30 day average: 1,508,250 | 90 day average: 996,267

Product Description

Leonard da Vinci drew pictures of helicopters; Wilbur Wright said they would never work. But Igor Sikorsky proved him wrong, inventing the first working helicopter and building the company that still bears his name.

Product Categories

Amazon > Books > Subjects > Engineering & Transportation > Transportation > Aviation > Helicopters

Amazon > Books > Subjects > Children's Books > Cars, Trains & Things That Go > Planes & Aviation

Amazon > Books > Subjects > Children's Books > Biographies > Science & Technology

Amazon > Books > Subjects > Children's Books > Biographies > Historical

Amazon > Books > Subjects > Children's Books > Science, Nature & How It Works > Inventions & Inventors

Amazon > Books > Subjects > Children's Books > History > Exploration & Discovery

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