While I was away from the computer for a week, I made some progress in my pile of old SF paperbacks.
The Silent Sky by Lloyd Biggle, Jr. is a 1977 retitling of the 1967 collection The Rule of the Door and Other Fanciful Regulations. If you open the book to the title page, you'll see yet another title, this time Out of the Silent Sky. In any case, it collects stories from 1957 to 1965.
The Diploids by Katherine MacLean is a 1962 collection of stories from 1949 to 1953. The front cover has the title has The Diploids and Other Flights of Fancy. Anyway, both collections were pretty good.
Double, Double by John Brunner is a 1969 novel. It's pretty much a monster movie. Creature from the deeps of the sea emerges, with the ability to absorb other animals (yes, including people) and take on their characteristics. It was OK, for that sort of thing. Very much of its time, with a rock-n-roll band as major characters.
I have just started Pacific Edge by Kim Stanley Robinson (1990), his vision of a utopian version of Orange County, California, in the late 21st century.