Now here's a weird, interconnected story with multiple narrators who are even more multiple because most of them are time travelers so they are themselves at multiple ages. The story begins with the foursome of British women who discover time travel in the early 1970s. It jumps back and forth to their future selves, their future descendents' selves of various periods, and gestures to time periods as late as the 2400s (which seem to be a return to feudalism).

The plot is partially driven by understanding the death of one of the founders, but the time traveling element makes people feel less like death is final. One character works as a time traveling detective. As such, she can't prevent a crime, but she can impact elements around it. The paradoxes are referenced but not entirely explained, which I don't mind.

Quote of the novel:

They were librarians and curators--the kind of women who write zines and collect retro toys.