Cleveland, OH: The Goldsmith Publishing Co., (ca 1930, c 1919) dj. Hardcover - Second book in this World War I adventure series. A "tale of army aviation. Entrusted with a special mission, the young airmen go over the German lines and learn important secrets. They had previously aided an American girl who had a German guardian, and they fall in with this rascal, who tries to make trouble for them. They are captured and sentenced to be shot. How they manage to escape makes reading no boy will want to miss." Illustrated by Robert Gaston Herbert. 216 pp plus 2 pp publisher's ads.