Written in collaboration in 1922 by the author of Felifax, this five-volume saga (of which this is the last), which chronicles the early years of the 21st century, takes place in a quasi-utopia-like Earth, where, thanks to the genius of master scientist Oronius, humanity has mastered natural forces.
However, Oronius' former colleague Otto Hentzen, a mad scientist who has allied himself with the beautiful, deadly Princess Yogha, has sworn...