Publisher's Synopsis
When the Inter-Planetary Corporation's top spaceliner Arcturus took off on a routine flight to Mars it turned out to be the beginning of a most unexpected and long voyage: attacked by a mysterious spaceship, the liner crash-landed on Ganymede. The survivors must first master that world's primeval terrors, then construct a new spacecraft, and finally, find a way to deal with the warring intelligences of the Jovian system. The computer, his calculations complete, watched the pilot with interest, for, accustomed as he was to traversing the depths of space, there was a never-failing thrill to his scientific mind in the delicacy and precision of the work which Breckenridge was doing--work which could be done only by a man who had had long training in the profession and who was possessed of instantaneous nervous reaction and of the highest degree of manual dexterity and control. Under his right and left hands were the double-series potentiometers actuating the variable-speed drives of the flight-angle directors in the hour and declination ranges .
