This is a good vigorous aviation story, for men as well as older boys. There is nothing of the career book about it, although there is a vast amount of information on the subject of modern aviation worked into a good adventure tale. One gets an idea of the untouched frontiers towards which modern aviation is simply reaching out of the meticulous detail involved in each forward step and the fine spirit of the men behind the achievements. And the underlying psychological problems are well handled. I'd be tempted to sell this as adult fiction and recommend it as a plus for boys.