Mass Market Magazines
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Published Mar 1964 by Scholastic Book Services.$2.50
1st printing. By Robert Silverberg. Illustrations by Leonard Kessler. Are the Old Martians really a lost race - just withered mummies lying in dark caves? Or are they still alive - somewhere on the red planet? Sally and Jim find out. They must help their father discover if the Old Martians still exist. His life work as a scientist is at stake! But it is not easy. They are only vivitors to the Mars colony in this year 2017. And no one really wants them there. Softcover, square bound, 5-1/4-in. x 7-5/8-in., 124 pages, B&W text with B&W chapter illustrations. Cover price $0.35.