Story on the back:

"The Martian invaders used atomic ray guns as they patrolled the streets of the city. Any unfortunate Earthman in the path of the aliens was easily destroyed. Human flesh and clothing was not able to withstand the heat of radiation from the ray guns. A group of young men banded together in a plot to cut the oxygen lines on the Martians’ spacesuits. Creeping up slowly behind them, the youths were poised to strike. Suddenly the spacemen whirled around, as if an inner sense had warned them of their peril. Firing their guns, the invaders quickly wiped out their attackers. The Martians continued on their way, leaving only the charred bones of the brave youths behind them."