Olga Romanoff (UNABRIDGED‪)‬

"Olga Romanoff (1894) is a science fiction novel by the English writer George Griffith, first published as The Syren of the Skies in Pearson's Weekly.
The novel continues (from The Angel of the Revolution) the tale of a worldwide brotherhood of anarchists fighting the world armed with fantastical airships, ending on an apocalyptic note as a comet smashes into the earth. - Summary by Wikipedia"