This is one of the earlier science fiction books I read which has hooked me to science fiction ever since.
The Day of the Triffids
Wyndham’s novel has two strands of catastrophe. Firstly, lights from a meteor shower blind anyone who watches it (and that’s most people) and the visionless society completely breaks down. Then the triffids – walking, killing, meat-eating plants – take advantage of the whole situation and go on the rampage.