The Day of the Triffids, John Wyndham, Doubleday & Company Inc, 1951, 216 pp
I first learned about this book through Jo Walton, whose heroine in Among Others read it, among many other books. (Here is a list.) Naturally I then kept coming across the title on blogs, etc. My husband saw me reading it and remembered seeing the movie. (1962, British film.)
The book is short. Pretty good 1950s science fiction. I was struck by the way Wyndham interwove ideas with the plot, but then realized that was the way it was done in most of the 1950s sci fi I have read. Some authors do it better than others; Asimov was the best but Wyndham is not bad.
The triffids are odd plants that can move. Somewhere just before I read the book, I came across an article (probably on the web) about trees that can "walk" by putting down roots ahead of them and letting go of roots behind them. Now I can't remember what they are or where I read it. The wonders of the reading life!
Triffids are carnivorous, except they kill people first with a poisonous sting, then eat them when they are fully dead. Technically they are carrion eaters which is actually more gross.
Otherwise The Day of the Triffids is about the aftermath of a planetwide disaster and the ways people figure out where to go from there. It was never exactly clear how the green flashes of light from a meteor shower were connected to the menace of the triffids. Nor was it clear where the triffids came from, though they became a menace when men began to farm them and use one of their byproducts for fuel.
I see why it became a classic and how it influenced many later sci fi books. If you intend to be or are a writer of science fiction, you must read John Wyndham. But he is more than historically relevant. The Day of the Triffids is a good read.
(The Day of the Triffids is available in paperback and eBook by order from Once Upon A Time Bookstore.)