The book "Flying Boys on a Secret Mission; or, Excitement in the Air" by the author Frank Walton is an exciting story of exciting adventures of two brave boys who own a unique flying device. After their invention falls into the hands of a determined criminal, the boys engage in an uphill battle to get it back. To save their inventive miracle, the boys are forced to go on a dangerous mission of espionage and high risk. Will they be able to play to their advantage in this game and save the world from danger? A fast and intense event, a battle in the air, loyal friends and bravery - all this is mixed in the exciting plot of Frank Walton's book, which consists of elements of an adventure novel and a spy detective.