| First published by Sully, this
    series was later reprinted by Saalfield, Goldsmith, and World Syndicate. | 
      THE AIR SERVICE BOYS FLYING FOR FRANCE; or, The Young Heroes of the
        Lafayette Escadrille  -- "Two chums join the aviators in
        this country, learn how to fly, and then journey to Frqance and tender
        their services to the LAfayette Escadrille. They go to the flying school
        of the French army and are taught the tricks of the famous French
        flyers. Then comes some thrilling services in the battle front, where
        one lad succeeds in unmasking a rascally German." -- illustrated by Robert Gaston Herbert. 1918.
        Sully; Goldsmith; World Syndicate; Saalfield.
 
THE AIR SERVICE BOYS OVER THE ENEMY'S LINES; or, The German Spy's
        Secret -- "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." -- illustrated by Robert Gaston
        Herbert. 1918. Sully; Goldsmith; World Syndicate. Read
        it online!
 
THE AIR SERVICE BOYS IN THE BIG BATTLE; or, Silencing the Big Guns
        -- "A certain long range German gun had been doing a
        tremendous lot of damage and it was entrusted to the young airmen to
        locate this gun and put it out of service. It was a perilous job and one
        requiring an abundance of nerve. A story which will be followed with
        breathless interest by all. " --1919. Sully; World Syndicate.
 
THE AIR SERVICE BOYS OVER THE RHINE; or, Fighting Above the Clouds
        -- illustrated by Robert Gaston Herbert. 1919. Sully; Goldsmith; World
        Syndicate.
 
THE AIR SERVICE BOYS FLYING FOR VICTORY; or, Bombing the Last
        German Stronghold -- 1919. Sully; Goldsmith; Saalfield; World
        Syndicate.
 
THE AIR SERVICE BOYS OVER THE ATLANTIC; or, The Longest Flight on
        Record -- 1920. Sully; World Syndicate; Goldsmith.
        
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