Of course you have read "Triffids", "Chrysalids" and "Midwich", and while this short story collection doesn't reach the heights of Wyndham's classics, it still delivers many morsels of his brilliance. I read it at school in the 1970s, and returning to it in 2022 it was striking how some of the stories had stayed with me, especially "Survival" and "Pawley's Peepholes".