Not In Solitude

Young Dr. John Dane—a newspaperman and a physicist—was sure he would find plenty to report on the first trip to Mars with Colonel Cragg. But, in spite of Cragg's obvious contempt for Dane, the trip proved disappointingly dull until some of the scientists suddenly and mysteriously disappeared. From then on events rocketed to an explosive climax as it became increasingly clear that a hostile intelligence on Mars was trying to prevent the spacecraft's return to Earth.