I was going to say that I'd had no idea John Wyndham had anything to do with "Chocky", but then I realised it was the film "Chucky" I was thinking of... (I wouldn't have put it past him to have originated a horror film franchise!)

Going by the synopses on the Web, I don't think I've read that one, although I've got some very obscure SF that he originally published under another name; unfortunately I can't lay my hands on my Wyndham books at the moment.

"The Kraken Wakes" (global warming avant la lettre -- I knew about the potential results of a half-centimetre rise in sea levels long before that sort of thing became front-page newspaper stuff!), "The Midwich Cuckoos" and "The Trouble With Lichen" are all well worth reading.