"The Day of the Triffids" by John Wyndham

This is an all-time classic Sci-Fi or Speculative Fiction, to be more exact.  Written in the 50s, it describes taking over the world by a species of intelligent, mobile, carnivorous plants, called "Triffids" and probably developed through genetic experiments by the Soviets, in order to grow them for their precious oil they produce.  However, after one night of apparent meteor showers, the entire population of Earth, humans and animals, become blind and also infected by a sort of plague.  This causes much of the planet's population, over 99%, to die in the first couple of weeks after the meteor shower, which might have been caused by the intelligent Triffid overmind in order to eliminate the main evolutionary advantage humans have over intelligent plants.

The Triffids hunt the remaining humans, killing them with their sting and poison, and then feeding off their decomposing bodies, using the nutrients to grow and propagate.  However, many of the surviving human groups are busy fighting each other, and being animals to each other, rather than deal with the common threat in the beginning.

Bill Mason, the protagonist of the novel, a biologist specializing in Triffids, survives with his sight intact because he is in a hospital, after a Triffid atack, with his eyes bound, when the 'meteor' shower occurs.  He walks around post-apocaliptic London, trying to figure out what to do, while alternately attracted, rejected or imprisoned by various roaming groups, each of which thinks they have the solution to survival.

Eventually the survivors retreat to the Isle of Wigh, where Triffids are kept at bay by constant culling and destruction of seeds.  A gem, and originator, of the post-end-of-the-world genre which has become extremely popular lately.  Many movies, comics, graphic novels etc. were made after this book, but reading it is still a singular experience, especially since it was written before the travesties of reality television and social media and is thus slow and even paced.