I know this is oddly specific, but DH and I are approaching this stage of life, and I find I like to “read ahead” that way - maybe learn a bit by analogy via fictional characters’ lives.

It’s the identity shift / life transition piece that interests me most, not the financial planning etc.
I’m open to all types of characters in this setting / life phase. In relationships or not, with kids or not, early retirement or 60s/70s, in different economic circumstances etc. I’m curious what happens when someone’s work drops off and space opens up. How does their life or personality or relationships change (or not)?
Though I much prefer fiction, I’m aLao open to non-fiction, too. But only about the interior/identity stuff. Not looking for tactical how-to books or financial planning guides etc. Thanks!