John Wyndham, The Day of the Triffids. Better than I expected; I knew a movie had been made about it back in the olden days, so I mostly expected a campy 1950s scifi movie feel to it. Not so; humanity is blinded, beaten, confused, ravaged by disease, and killed & eaten by ambulatory carnivorous plants -- leaving the survivors to figure out how to keep what's left going. Good book, from a scifi and a social point of view.