Air Service Boys Over the Enemy's Lines

The adventures of young American pilots during World War I in their air-duels with German pilots and their interception of German homing pigeons used to send messages from German spies in France back to Germany." -- "Another thrilling 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.