The Ganymede Takeover

The three guerillas made a raid for food and supplies. The defenders kept them off with lasers. So they used the strange new weapons that they had found. The illusion machines. They worked well. Twenty-four phantom men who fought like veterans helped to carry the captured supplies up into the mountains. Later they conjured up a complete army of illusions: giant vampires, man-eating plants, Valkyries, cannibal children. The trouble was, when they switched the off the machines, the phantoms didn't go away...