Some observations about women's fiction tropes after reading too many of these books back to back:
The "woman at a crossroads" trope works because the crossroads is almost never a single decision. It's a tangle of decisions that have been quietly accumulating for years, and the novel starts at the moment when they all come due at once.
Kristin Hannah wrote The Nightingale about two sisters in occupied France and The Great Alone about a teenager trapped in the Alaskan wilderness with an abusive father. Different centuries, different continents. The trope underneath both is identical: a woman who has to decide what she's willing to lose in order to protect someone she loves. Hannah just keeps finding new landscapes to set that question inside.
The "book club novel" has become its own sub-category, and I'm not sure that's a compliment or an insult. It means the book generates discussion. It also means the book has been pre-sorted into a category that some readers associate with safe and some associate with serious. The label does real work, and the work it does depends entirely on who's reading.
The best family secrets in women's fiction aren't shocking. They're sad. The reveal that lands hardest is the one where the reader thinks, "Oh. That explains everything about how this family talks to each other."
Liane Moriarty puts murder in the first chapter of Big Little Lies and then spends the rest of the novel at school drop-offs and dinner parties. The trope is domestic suspense, but the technique is withholding. You know someone died. You don't know who. Every scene where mothers chat about costumes and parking lots carries a charge it wouldn't have without that opening promise of violence.
Women's fiction readers will forgive a slow start. They won't forgive a dishonest narrator who turns out to be dishonest just for the plot twist. There's a difference between a character who doesn't understand herself yet and a character who's withholding information from the reader for no reason other than to set up a reveal in chapter thirty.
The "returning home" trope, where a woman goes back to the town she left, usually does double duty. The town hasn't changed. She has. And now she has to reconcile the person she became with the person everyone there still thinks she is.
Hannah has said in interviews that she writes about "ordinary people in extraordinary circumstances," and I keep thinking about how that framing changes what you expect from the plot. Ordinary people don't have special skills or secret training. They just have whatever stubbornness or love or fear got them through the last hard thing, and now they're using it again.