If Not You by Ellen O'Clover

If Not You by Ellen O’Clover

Five years of beating each other. One month of trying not to.

Genre:
O'Clover writes a rivals-to-lovers romance that is really about fear: of losing a best friend to marriage, of turning into your mother, of loving someone who might forget you. The banter sparkles and the grief is handled with care. The last act leans on a very familiar misunderstanding.
  • Publisher: Berkley Books
  • Genre: Romance, Contemporary
  • First Publication: 2026
  • Language: English

Two whiteboards stand side by side in a penthouse suite in Aspen. A client from a luxury resort chain names a topic, starts a two-minute clock, and asks two rival copywriters to fill their boards with headlines. One of them writes so fast the marker squeaks. The other stares at a blank white square and silently drafts puns about holiday breaks that she would rather die than write down. If Not You by Ellen O’Clover is built out of moments like that one: small, professional humiliations between two people who have spent five years keeping score, and a month on the road that finally makes them stop counting.

Two Writers, One Whiteboard

Mattie French is a copywriter at a small Chicago agency called the Art Room. She wears only black, writes only in blue ink, and needs silence and time to think. Campbell Porter works for Slater Faust, the big agency across town. He is loud, sunny and Southern, wears shirts printed with horseshoes and mallards, and can produce twenty good lines while she is still sharpening one.

He beat her for the only full-time job at the end of their intern summer. Years later he won the industry’s biggest prize for a sportswear campaign whose slogan gives the novel its title, and Mattie was in the audience when he did. Now both agencies are the finalists for Wicksteed Resorts, and both teams have to spend a month living on the client’s dime: two weeks at a mountain resort in Aspen, then two at a clifftop property on the Northern California coast.

O’Clover alternates the present-day trip with short chapters set during that intern summer, and the flashbacks do real work. Each one reframes something Mattie thinks she knows about Campbell, and by the halfway mark it is clear that her version of their history is badly incomplete. The rivalry itself is great fun. There are stolen fountain pens, a notebook held hostage, a horse called Nantucket with a personal grudge, and a truce brokered in a restaurant hallway over a sick cat. Even Campbell’s habit of calling her by her surname, never her first name, becomes a quiet gauge of how far apart the two of them still are.

What If Not You Is Really About

Under the banter, If Not You by Ellen O’Clover is a novel about three kinds of fear, and it takes each one seriously.

The first is Ava. Mattie’s best friend since the third grade, her roommate and her real family, has just got engaged, and her fiance has moved into their apartment to save for a house in the suburbs. Mattie does not want marriage or children herself. She also cannot imagine a life where Ava is not down the hall. Watching her plan a bachelorette party while quietly grieving the end of an era is the most honest thread in the book.

The second is Mattie’s mother, a published poet who gave up writing when she became pregnant and made sure her daughter knew it. It explains why Mattie treats every assignment as a test she cannot afford to fail, and why a romance feels less like a gift than a trap.

The third belongs to Campbell. His father has early-onset dementia and lives in a memory care home in North Carolina, and he is quietly trying to sell a novel about memory that nobody seems to want. The chapters that deal with his dad are the best writing in the book: specific, unsentimental and very sad, with his sister’s wedding looming as the moment the family has to face what he can and cannot do.

Where If Not You by Ellen O’Clover is cleverest is in how these fears collide. Mattie is afraid love will cost her herself. Campbell has watched love cost his mother everything, and both of them are wrong in ways the other can see.

Where If Not You Gives Ground

  • The final-act split is a familiar move. A humiliating incident at work sends Mattie into a retreat that romance readers will see coming, and the book leans on a long stretch of avoidable silence to get to its ending.
  • The villain is thin. The sexist creative director at Slater Faust exists mostly to say one unforgivable thing, and he is never much more than that.
  • The resort gloss wears thin. A lot of pages go on thread counts, room fragrance and cucumber water. It is partly the joke, but the joke gets repeated.
  • Mattie’s self-sabotage can grate. Her public dig at Campbell in front of the clients is written as a low point, and it is a very low one.

Content Notes and Heat Level

If Not You by Ellen O’Clover includes a parent with early-onset dementia living in memory care, emotional neglect by divorced parents, a pet accidentally poisoned by cannabis edibles (she recovers), workplace sexism including a degrading comment from a senior colleague, an unwanted advance from a stranger in a bar, a diet-culture storyline from the past, a bloody head injury, and plenty of drinking. The heat level is high: several explicit, open-door scenes in the second half, with consent handled carefully and often explicitly.

Read These Next

Five for readers who finish If Not You by Ellen O’Clover and want more rivals who are also writers:

  1. The Heartbreak Hotel by Ellen O’Clover. Her adult debut, set in the Colorado mountains, for the same tenderness about grief.
  2. The Hating Game by Sally Thorne. Two executive assistants, one promotion, and a shared office that becomes a war zone.
  3. Beach Read by Emily Henry. Rival novelists from college days who dare each other to swap genres for a summer.
  4. Great Big Beautiful Life by Emily Henry. Two writers competing for one job on a remote island, and a love story that grows out of the contest.
  5. Happy Place by Emily Henry. For the thread about a friend group changing shape, and pretending everything is fine on vacation.

What Stays With You

The object I keep thinking about is a pen. Mattie pockets Campbell’s fountain pen after the headline contest in Aspen, mostly out of spite, and he takes her notebook in reply. Over the following weeks the two things change hands several times, with notes left inside and pens returned in ways designed to embarrass. It starts as a prank between enemies and ends, a few chapters from the close, as the only thing on a desk that she has chosen to keep.

That is what If Not You by Ellen O’Clover does well: it lets small, petty rituals turn into proof of attention without anyone announcing the change. The last act stumbles on a familiar misunderstanding, and the resort sometimes gets more description than the heroine. But the grief is real, the friendship thread is lovely, and Campbell is one of the most likeable heroes the genre has produced this year. Four stars, and a strong reason to keep reading whatever Ellen O’Clover writes next.

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  • Publisher: Berkley Books
  • Genre: Romance, Contemporary
  • First Publication: 2026
  • Language: English

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O'Clover writes a rivals-to-lovers romance that is really about fear: of losing a best friend to marriage, of turning into your mother, of loving someone who might forget you. The banter sparkles and the grief is handled with care. The last act leans on a very familiar misunderstanding.If Not You by Ellen O'Clover