This is the fourth volume in the Aviation Century series, which explores the 100-year history of flight. With color and black-and-white photography throughout, the book chronicles the developments in commercial aviation after World War II that have made flying part of everyday life for millions of people and for airfreight services. Chapter 1 takes the story of commercial aviation through the end of the twentieth century, completing a 100-year era in which aircraft grew from small biplanes to spacious jets. Chapter 2 traces the exploits of pilots who founded flying clubs, using planes for leisure or as personal transport. The authors chronicle the role of test pilots and discuss zeppelins, dirigibles, blimps, hot-air balloons, and helicopters. A final chapter offers an introduction to the challenges of aeronautical research and development. Like the other three volumes in the series, this one is an absorbing history of flight.