Discovering a hitherto unsuspected intelligent species inhabiting their solar system, the Worm-Kings of Ganymede effortlessly conquered Earth using electronically augmented illusion technology. They did not suspect how inventively troublesome humans could be once they themselves got the hang of that technology...!
Original title: The Ganymede Takeover
Genre: Fiction→ Science Fiction→ Alien Beings→ Alien Invasion & Post-occupation
- Cover art by Jack Gaughan