books.google.co.uk - Looks at the history of the exploratory high-altitude balloon trips of the fifties and early sixties into the stratosphere, and the people that risked their lives to make the flights a success....http://books.google.co.uk/books/about/The_Pre_astronauts.html?id=1QS38bu9iTwC&utm_source=gb-gplus-shareThe Pre-astronauts
