Few men even in the Air Service had so many and so astounding adventures as befell the author of “Luck on the Wing,” and of these, fewer still lived to tell the story. In simple but vivid language Major Haslett tells in this book of many of his astonishing experiences. Life at the Front with him was just one adventure after another—from his first trip over the lines when he sat in the observer’s seat in a French plane perfectly at ease and in blissful ignorance of a French battery’s desperate efforts to signal him that there was a squadron of seven German Fokkers over him. Through this first adventure his amazing luck carried him safe (or was it a Divine Providence moving as ever inscrutably?). And this same amazing luck carried him safely through an even more remarkable adventure. While under heavy ground fire on an artillery mission he was thrown out of his “ship” but caught the muzzle of his machine gun as he went over, and in some way managed to pull himself back into the airplane—and then completed his mission. But on September 30, 1918, even Major Haslett’s luck deserted him and he was shot down and captured. The rest of the war he spent mainly in unsuccessful efforts to escape from German prisons. “Luck on the Wing” tells of these adventures—and others. It is appropriate in concluding this brief introduction to tell of some of the work of Major Haslett overseas which he himself cannot well mention. Much of this officer’s service at the Front was spent as Operations Officer. As such his duties did not require him to execute missions over the lines himself. Major Haslett insisted always on doing not only the full share of such perilous work as would fall to an officer not in an executive position, but more. His argument to his commanding officer was that only by experience over the lines could an operations officer thoroughly master his work—a theory that he went far toward proving. Whenever ultra-dangerous work presented itself this officer was quick to volunteer. Major Haslett was more than an observer, he was a student of air operations. He was among the first of the American officers to prove that low flying over German trenches was not only possible but was a method of effective attack for airplanes. At the time that he was shot down he was engaged in working out the problems of adjustment of artillery fire on moving targets by airplanes—a question of prime importance in warfare of movement. This officer during the course of his service at the Front not only contributed exceptionally distinguished personal services over the lines and as an operations officer but he also contributed ideas and suggestions of considerable value in the development of Air tactics and Air strategy, and as I have mentioned before he had the proud record of successfully executing every mission which he undertook during his entire service at the Front with the single exception of the mission he was on when he was shot down by superior enemy forces.