Böcker av Kenneth Bulmer

Jeremy Dodge knew the Earth would face starvation if it were not for the new science of "aquaculture." With the world's population numbering many billions, only the extra food being cultivated on the bottom of the sea could feed everyone. But, like the rest of the surface-dwellers, Jeremy did not know what a vicious monopoly underwater cultivation had become. That is, until the dreadful moment when he himself was kidnaped and dragged beneath the depths. And there he was to learn that just making his own escape would not be enough-he would have to save mankind from the tyranny of a new race of water-breathing human monsters!

To pave the way for galactic conquest, a united Earth had invented the robot Messiahs. These ingenious devices, dropped from space, created on each alien planet a new and convincing faith-----based on the future coming of the new men from Earth. Roy Inglis was a trouble--shooter for the "Earth Gods" operation and he was among the very few who knew that someday they would run into the synthetic equivalent of the Devil. There'd be another set of interplanetary missionaries--only these would be monsters from some anti-Earth part of the universe. But he never realized that he himself could be the first convert to the creed of the Evil Ones--and that he might never know it until it was too late for the rest of humanity!