ACE SCIENCE-FICTION NOVELS
D-266 TWICE UPON A TIME by Charles L. Fontenay
Eternal guardians of the star circuit
and THE MECHANICAL MONARCH by E. C. Tubb
One extra man could unbalance the world.
D-205 THE EARTH IN PERIL Edited by Donald A. Wollheim
Exciting stories of invaders from space.
and WHO SPEAKS OF CONQUEST? by Lan Wright
The galaxy said: "Earthmen, go home!"
D-215 THREE TO CONQUER by Eric Frank Russell
Only one man knew the Earth was invaded!
and DOOMSDAY EVE by Robert Moore Williams
Were the strangers impervious to H-Bombs?
D-199 STAR GUARD by Andre Norton
"Fast-paced and good reading."—Saturday Review
and THE PLANET OF NO RETURN by Poul Anderson
The first—or the last—on that new world?
D-193 THE MAN WHO JAPED by Philip K. Dick
In the days of the robot peeping toms!
and THE SPACE-BORN by E. C. Tubb
Their world was entirely man-made!
Two Complete Novels for 35¢
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