Skyhooks:

New York: Morrow, 1967. First edition (presumed; no earlier dates stated). Octavo in white DJ (white spine); 96 p, b&w illus; 22 cm. Small tear & mild edge-wear to price-clipped DJ protected in archival mylar sleeve, barely rubbed spine foot & head, else near fine(-) in very good DJ. Hardcover.

This book is about the helicopter: its development, principles of flight, and uses as air taxi, rescue vehicle, traffic control center, crop duster, skyhook and in industry or war. Helicopters -- Juvenile literature.