My Readers Guide for It Could Have Been Her by Lisa Jewell will look at this new dark suspense story by the author of None of This is True. My post includes a character list, plot summary, spoilers and a Q and A that covers my questions about the book and yours. Let’s discuss!

Readers Guide for It Could Have Been Her by Lisa Jewell
Table of Contents
- Readers Guide for It Could Have Been Her by Lisa Jewell
Jen’s Quick Take on It Could Have Been Her

- I LOVE books with crossover characters so I was excited to learn that “Mad Jane” Trevally from Don’t Let Him In would be the main character in It Could Have Been Her. Part of my Readers Guide is a quick recap of Jane; I have a longer one as a printable on Gumroad.
- I also loved that It Could Have Been Her incorporated many themes and elements from other Lisa Jewell books. I will discuss this further in the spoilers section!
- The every-shifting timeline of the book got to me a little (I have a very linear brain) so I made a chronological timeline (with inevitable spoilers) that you can check out when you’re finished.
- I really loved Jane as a main character and the way her own childhood and psychological hang-ups were incorporated into the story. “Mad Jane” turned out to be a reflective and insightful fifty-five year old (though still impulsive, which is part of her charm.
- Readers Advisory: like many of Jewell’s books, this has some dark themes that include child neglect/abusive parents as well as abduction and sexual assault (alluded to but not described on page). If these are triggering topics for you, proceed with caution and I am happy to answer questions.
- Publication date: June 23, 2026. Thanks so much to Atria books for my advance review copy.
Character List for It Could Have Been Her (Spoiler Free)
Jane and her circle
- Jane Treavally: twice-divorced fifty-something woman who lives alone in Dorset
- Dexter: Jane’s favorite stepson
- Brian, Bluto and Reggie: Jane’s dogs
- Tony: Jane’s ex husband; Dexter’s father
- Chloe Flint : Jane’s estate agent
- Helen Yaxley: Jane’s neighbor
- Rose White: Helen’s boarder, now missing
- Bill Newsome: Jane’s neighbor
- Natasha De Large: dog trainer; friend of Jane
The Black family
- Allen Black
- Annie Rich Black: his wife
- Vivienne Rich: Annie’s mother
- Jessamine Black: their daughter
- Jasper Black: Allen’s son.
- Daisy Black: Jessamine’s daughter
- Harvey Moore: Daisy’s (presumed) father
- Stuart Tucker: befriends Jessamine in the White Swan pub in the 2010s
- George and Spencer: neighbors of the Black family in the present
- Claire Connelly: one of the Black’s au pairs
- Stella Madden: rented a room to Jasper in the early 2000s
- Dr. Anthony Twist: psychotherapist/EMDR specialist in London
Locations:
- Rosebery Hall in Dorset (Jane’s ancestral “pile”)
- Thornwood in Hampstead Heath (creepy estate of the Black family)
- Seven Dials in Covent Garden (Tony’s townhouse in Central London)
What We Know About Jane Trevally from Don’t Let Him In
In brief, Jane Trevally is a supporting character in Don’t Let Him In who helps Paddy Swann’s daughter Ash investigate a scammer she knows as Nick. Ash’s mum Nina developed a relationship with Nick when he reached out after Paddy’s tragic death. Ash gets a bad vibe from him.
Jane was Paddy’s ex-girlfriend before Nina. Nina calls her “Mad Jane” because Jane didn’t take the break-up well. But since Ash is feeling a bit “mad” herself and Nina seems to be completely taken in by Nick, Jane is a sounding board and investigative partner for Ash.
After that case is over, Jane is feeling restless and at loose ends, so when a new mystery presents itself, she is all in, investigating with her new twenty-something sidekick, her stepson Dexter.
Plot Summary for It Could Have Been Her
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