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.[1]
McNabb, John (2012). "Scientific Romances: George Griffith". Dissent with Modification: Human Origins, Palaeolithic Archaeology and Evolutionary Anthropology in Britain 1859–1901. Archaeopress Publishing Ltd. pp. 312–318. ISBN978-1-78491-078-5.