Test pilots are a notoriously modest and reticent breed and their work has generally been undervalued because of their dislike of publicity. Much of their work has been of a secret nature, so this also inhibits discussion. Tests of Character is written to reveal the problems which have faced test pilots from the earliest years of aviation through the 1960s. Author Don Middleton has selected a number of test sorties and programs which were, indeed, tests of character. These tell the story of the difficulties faced by test pilots in turning the new machines into efficient aircraft capable of being flown by ordinary military and commercial pilots.