"Robur, o Conquistador" by Jules Verne is a science fiction novel published in 1886. When mysterious lights, sounds, and black flags appear worldwide atop famous landmarks, the enigmatic inventor Robur crashes a Philadelphia flight club meeting to challenge their beliefs about aviation. After kidnapping the club's leaders aboard his revolutionary flying machine, the Albatross, he takes them on a globe-spanning journey to prove the superiority of heavier-than-air flight, sparking a dramatic conflict over the future of human aviation.
Wikipedia page about this book: en.wikipedia.org/wiki/Robur_the_Conqueror Wikipedia page about this book: es.wikipedia.org/wiki/Robur_el_conquistador