The elephant in the room, the open secret, the thing that everyone sees but nobody talks about, is prime material for a book.
It's a relief to read about, a relief to write about. It's scary to approach, and liberating to touch.
we try to write around it, we may end up with an elephant-shaped hole
in the story. Everyone knows there's something missing, something
important we're not mentioning.
I once scribbled this in one of my notebooks: "You must write about the thing you must not write about."
This may be one reason people started writing in the first place: to name the elephants lurking in the corners.