The Book: The Day of the Triffids by John Wyndham. Originally published in 1951, the edition read was published by Crest (TI322) in 1970.
The Setting: Great Britain, sometime in a near past or present.
The Story: Civilization is destroyed and carnivorous walking plants begin the mopping up. Survivors band together and try to figure out a successful society and a potent herbicide.
The Science: The story hinges on two catastrophes. It is hypothesized in the novel that the catastrophes were not natural, nor alien in nature, but rather that they were orbital weapons accidentally detonated by one or the other of the super powers. At a time when the Cold War was underway, it was not unimaginable for the super powers to be placing horrible, novel weapons in orbit around Earth. Both the US and the USSR had planned such devices, but the Outer Space Treaty of 1967 explicitly disallows them. So it is unlikely that we will all be destroyed by our own space guns.
The Reaction: This is a good book. A genuinely good story, an interesting confluence of ideas, characters that are worth their salt, and angry plants. The social science of it is strong as well. Highly recommended.
The Cover: No art credit. Plant tentacles, green and yellow, and zombie looking people. It certainly sets the mood of uncertainty and fear. Not my favorite, personally, but very effective.
Next Up: The Illustrated Man by Ray Bradbury.