Three Worlds to Conquer Author:Poul Anderson Pyramid Books (c) 1964 — Publicatin date December 1974 — 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!
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The destinies of these worlds were strangely linked - and in the hands of man sentenced to instant death!« less