Condition: Acceptable. Damage on top of right cover. White mark. Please see the images for more details. May show signs of wear such as:
• Shelf wear or scuffing on the cover
• Creases, marks, or tears on pages or dust jacket
• Possible remainder marks or previous owner’s name/notes inside
Publisher blurb: "When suddenly all the fissionable material on Earth was exploded, Earthmen had their first notice of the aliens' arrival. And by the time the panic, death and chaos had been sorted out, reports were coming in about mysterious cities scattered across the face of the planet - huge areas of flickering light and awesome free energy, disorienting to human senses and impregnable to attack. The question was: were they alien bases...or something else?"