The Secret of the Martian Moons Author:Donald A. Wollheim Back to Mars! At long last--after four years of interplanetary study on Earth--Nelson Parr stepped aboard the Mars-bound space liner that was to carry him to his home planet. By the year 2120, Earth had established a colony on Mars and had explored the land--originally inhabited by Martians, a weird yet intelligent people...a vanished race. B... more »ut when Nelse discovered the three-fingered handprint in his cabin, he couldn't help but wonder whether the intruder might have been Martian. Could it be that the Martians still lived?« less