Three Worlds to Conquer book cover

Three Worlds to Conquer

Pages: 143
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Published: 1 Apr 1964
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Description

Three worlds:
Jupiter where no human could live but where men had strange allies and stranger enemies!
Ganymede where human settlers lay helpless under the guns of a spaceship directed by a madman!
Earth freed from a planet-wide tyranny, but facing total destruction from space!
The destinies of these worlds were strangely linked and in the hands of a man sentenced to instant death!