It might have been marginally acceptable for her to write a mediocre second novel in the late 1960s, but by now expectations are so absurdly high that I can’t imagine her writing much of anything that her fans didn’t view as a terrrbile disappointment.
I had a lit. professor in college who has done a pretty large amount of post grad work on Harper Lee and TKAM. She believes that when Harper Lee dies, her heirs will find a bunch of other works while sorting through her things. My professor had the theory that while HL chose to stop publishing, she did not stop writing.
I have neither proof of this nor cite for it, but I thought it might make an interesting talking point.
So, do you think there will be more books by HL published posthumously?
That would certainly be a swell way to take care of your heirs, to give them a supply of high-demand source material they could trickle out over the years.
You could write a good book about a famous novelist with one great book in them and how they spend their life.