There is no one who can do a better job on the human side of industry than Floherty. This time, he cross sections a number of industries, picking out the jobs that demand fearlessness in the face of danger. Test pilots, lightship crew, powder men, high wire men, sand hogs, divers, nitroglycerine men, harbor police, newsreel aces, and those human guinea pigs who offer their services to the cause of science. There is plenty of anecdotal and human interest material to liven the factual and vocational content. Plus adventure value.