Victor Appleton 
Tom Swift and His Air Scout, or, Uncle Sam’s Mastery of the Sky [EPUB ebook] 

Tom Swift and His Air Scout is a novel by Victor Appleton and part of the Tom Swift adventure series. In this book, Tom sets out to help Uncle Sam protect the nation’s coastlines by building an air scout. With his new invention, Tom embarks on a series of daring adventures and encounters with rival inventors, smugglers and spies as he protects the country and uncovers the secrets of the sky.