This one went into and explored many of the points that I thought Chocky would, which is doubly great because creepy kids are disturbing as hell, and because I can give Wyndham props for not repeating himself in hindsight.
There are differences with the pop-culture classic movie, as it always happens. Beyond the distillation over our narrator and Zellaby (which I imagine stems from a wish to transfer all the BAMF quality from the seemingly absent minded old man to a younger MC), the big fact is that the mind reading is not part of the original book. There is enough flash and imminent danger with the will thing. The hive mind is the cherry that makes the eerie otherness cake.
I loved how things proceed slowly, and this insistence of going about business as usual. When the mothers bring the babies back to town, you immediately go "Oh, fuck", and in their heart of hearts, you know every character kinda does too, but they bury themselves in self denial. And as the book comes closer to the end, you start thinking back to Zellaby's wondering if civilization had not been a bad survival idea.
Seriously, for all the old man seemed to everyone as digressing from the current point, he was very much clear-sighted.
I loved the sci-fi call backs (and the niggling for none going into the morally ambiguous). Some of the doubts it tries to posit (specially on evolution) are a matter of "science marches on" but I always end up finding the idea of outside influence entertaining. The social commentary (outside the references to sci-fi, that is after all a commentary on society too) was a mixed bag, some insightful, some blithely chauvinistic, and there is what is clearly a lesbian couple never addressed as such, so maaaybe fair for its time.
At any rate, I had fun reading it. And that's a good way to wrap up my bingo card and get my reading black-out. Just to wait for the calls now.