In the 1950s and early 1960s a small fraternity of daring, brilliant men made the first exploratory trips into the upper stratosphere, reaching the edge of outer space in tiny capsules suspended beneath plastic balloons. This book tells the story of these tenacious men as they labored on the cusp of a new age, seeing things that no one had ever seen and experiencing conditions no one was sure they could survive.

Mostly U.S. Air Force and Navy officers, among them doctors, physicists, meteorologists, engineers, astronomers, and test pilots, they struggled with meager budgets,...

A few years after his release from a North Vietnamese prisoner-of-war camp in 1973, Colonel Joseph Kittinger retired from the Air Force. Restless and unchallenged, he turned to ballooning, a lifelong passion as well as a constant diversion for his imagination during his imprisonment. His primary goal was a solitary circumnavigation of the globe, and in its pursuit he set several ballooning distance records, including the first solo crossing of the Atlantic in 1984. But the aeronautical feats that first made him an American hero had occurred a quarter of a century earlier.

By the time...