Story on the back:

"The flying saucers descended, landing on the outskirts of the city. Carrying powerful atomic weapons, the invaders stalked through the streets. Citizens trying to hide were wiped out with one blast from the alien heat guns. The Martians set about destroying the city... burning the homes, the schools and the factories. All vehicles were demolished and communication was completely disrupted. Those that survived lived in a nightmare world, afraid to wander outdoors and yet facing starvation if they remained locked in their basements. Once all the property had been destroyed, the Martians continued patrolling the city, gunning down any stray survivors without mercy."