I asked this on Threads and mentioned my favourites. The Chrysalids, the Day of the Triffids the Midwich Cuckoos, Chocky, The Trouble with Lichen and the Kraken Wakes were the ones I read.
I know he wrote other short stories, and some of the main novels were turned into films, but they never quite came up to the standards of the original books. Some of them were turned into TV series too.
Reading Wyndham got me into science fiction and I found I loved others too, like Issac Asimov, Arthur C Clarke, Anne McCaffrey, and Ursula K LeGuin.
Wyndhams style could be chilling, he sets up situations that can trap people and his descriptions are sometimes very macabre. I had the pleasure of reading them in the 1970s, once I’d read one I had to read more.
Mallaband-Brown 