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!