2 -
Air Service Boys Over the Enemy's Lines - The German Spy's Secret
3 -
Air Service Boys in the Big Battle - Or, Silencing the Big Guns
4 -
Air Service Boys Over the Rhine - or Fighting Above The Clouds
5 -
Air Service Boys Flying for Victory - or, Bombing the Last German Stronghold
6 -
Air Service Boys Over the Atlantic - The Longest Flight on Record
