George O. Smith

He travelled back in time to find his grandfather the right wife. Only his grandfather had other ideas...and promptly got engaged to the wrong woman!

It was the greatest manhunt in history...and while this frantic rescue mission went on, the alien spaceships were watching and waiting, holding themselves...

It was an invasion like no other—across not land or space, but across the dimensions. The people of two other Earths, victims of atomic experiments gone...

They wanted to make a traffic light of Old Sol...and they were surprised to get the red light from a green spaceman! A classic science fiction novel first...

When Jimmy's mother and father are murdered by their best friend for a radical new invention that educates children, Jimmy must escape and survive until he...

This volume of Wildside Press's Golden Age of Science Fiction MEGAPACK® series assembles a second volume of George O. Smith's classic short stories. Here...

The plague was man-made, and it promised a devastating effect on mankind. Stopping it was—quite literally—a rat race! Classic science fiction by George O....

Earthmen are overwhelmed by alien invaders, but then they attempt to conquer their foes from within.

During the Third Interplanetary War, atomic bombing sprang up, died, and then continued on a very strange nuisance-value basis. It became complex, and upon...