Flight
Free to read here, from Project Gutenberg.
Langley Memoir on Mechanical Flight, Parts I and II
Sky Island
Birds in Flight
The Airship "Golden Hind"
Artificial and Natural Flight
Sky Island
The Boy Aviators' Flight for a Fortune
Der Vogelflug als Grundlage der Fliegekunst
The Boy Aviators on Secret Service; Or, Working with Wireless
The Boy Aviators in Nicaragua; or, In League with the Insurgents
