| THE SKYLARKING COMRADES SERIES | |
| Information | Titles | 
| "Flying Buddies" is labelled as No 2 in the "Skylarking Comrades" series. Marquith wrote another book published by World Syndicate in 1930, The Border-line Mystery; I am not sure if that is No 1 in the series, or if there are any others. | 
 | 
| Source: WorldCat Holdings |