Aha!

I had finished another book! Thanks to the library website and the "my reading history" feature, I figured it out!

Mr. Bridge by Evan S. Connell.
This one was as good as Mrs. Bridge, but equally disturbing. Both books just made me reflect on what a quick life it is and how so much of it is wasted and squandered. Not really uplifting, but a good reminder that we have but one shot to enjoy our time on this planet.