John Wyndham

Genetic mutation has devastated the world and a bleak, primitive society has emerged from its ruins ; a society which punishes any deviation from rigid norms. Ten-year-old David is having strange dreams about a mysterious city. But in his ultra-religious village of Waknut, all abnormality is abhorred, and he soon realizes that differences can be very dangerous indeed.

Intelligent plants terrorize Earth's population after a meteor shower strikes.

"Something is terribly wrong in the tiny village of Midwich. After an unseen force invades a quiet coastal town, ten women mysteriously find themselves pregnant. Local physician Dr. Alan Chaffee and government scientist Dr. Susan Verner join forces when the women simultaneously give birth-- and the reign of horror begins" -- Container.