Three worlds to conquer

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General Fiction General Fiction
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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!

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Paperback

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Mass Market Paperback
Jan 1974 Pyramid ISBN 0515035416
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eBook

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eBook
Mar 2015 Fiction Hunter Press ISBN B00VB14116
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eBook
Apr 2015 Fiction Hunter Press