Condition: Acceptable. Please see the images for more details.
Cover artist: Ralph Brillhart
Blurb: “It all started with a runaway chain reaction in a gigantic thermonuclear power plant on Mars, where Earth's surplus population was trying to establish new elbow room.
Then came the horrendous explosion and, without warn-ing, the basic unity of the solar system was disrupted.
Mars moved toward Earth to exert tremendous new gravitational pressures on it….