The Motor Boys in the Clouds
or A Trip for Fame and Fortune
The Motor Boys Over the Rockies
or A Mystery of the Air
The Motor Boys Over the Ocean
or A Marvellous Rescue in Mid-Air
The Motor Boys on the Wing
or Seeking the Airship Treasure
The Motor Boys After a Fortune
or The Hut on Snake Island
The Motor Boys on the Border
or Sixty Nuggets of Gold
The Motor Boys Under the Sea
or From Airship to Submarine