⭐ Four Stars — Fake Dating, Lab-Coat Longing and One Giant Grumpy Marshmallow
Reading The Love Hypothesis feels a bit like curling up in your favourite jumper while the rain taps at the window. It’s the sort of book that wraps you up in warmth and gentle humour, with just enough awkwardness and slow-burn glances to make you want to nudge the characters along (but also savour every moment).
Olive is the kind of anxious academic mess I can’t help but root for, and Adam manages to be intimidating to literally everyone except her. Their fake relationship? Let’s just say it’s about three percent good decisions and ninety-seven percent mutual pining, which is exactly the ratio I like in my comfort reads.
It didn’t quite make it to five stars for me, mostly because Olive’s stubborn refusal to see what’s right in front of her had me wanting to gently shake her (with love, of course). But as a cosy, clever romance with just the right amount of science, sweetness, and a hero who is already halfway gone? It’s a treat.
The hypothesis is supported.
📚 Book Details

Title: The Love Hypothesis
Author: Ali Hazelwood
Series: Standalone
Format Read: Paperback and Audiobook
Genre: Contemporary Romance / STEM Romance / Academic Romance
Publication Date: September 14, 2021
My Rating: ⭐⭐⭐⭐
Spice Rating: 🌶️🌶️
Read Type: First Read
Content Note: This contemporary romance contains workplace sexual harassment, an academic power differential, anxiety, grief following the past death of a parent from cancer, explicit sexual content and strong language.
→ View the full content-warning list here.
Please protect your mental health and read the complete content warnings before starting.
I purchased my own physical copy and read it alongside the audiobook. All opinions—and my sudden willingness to defend Adam Carlsen in every available room—are entirely my own.
✨ At a Glance
Tropes: Fake Dating • Grumpy × Sunshine • Slow Burn • He Falls First • Academia Romance • Workplace Proximity
Vibes: Cosy STEM Chaos • Awkward Flirting • Quiet Pining • Lab-Coat Longing • Secretly Soft Giant
Romance: An anxious PhD candidate and the intimidating professor who agrees to become her fake boyfriend
Hero Status: Terrifying university grump on the outside; emotionally constipated marshmallow on the inside
Biggest Strength: Olive and Adam’s slow-building chemistry
Main Weakness: Olive continues misunderstanding Adam’s feelings long after the reader has solved the equation
Favourite Element: Adam quietly caring for Olive while pretending everything is perfectly normal
Audiobook Highlight: Callie Dalton capturing Olive’s anxious internal spirals
Audiobook Wish: A dedicated male narrator for Adam
Would I Reread It? Yes—especially when I need a cosy romance
Most Accurate Reaction: Two highly intelligent scientists sharing one completely useless romantic brain cell
💭 The Quick Take
The Love Hypothesis is the kind of warm, witty comfort read that had me grinning into my mug, cringing in the most affectionate way, and yes, kicking my feet like I was sixteen again.
The fake-dating setup is gloriously over-the-top in just the way you want it to be. Olive is the sweetest kind of anxious mess, and Adam’s grumpy-but-soft-on-the-inside vibe had me rooting for them from the start. Their chemistry doesn’t explode so much as simmer, building through those small, quiet moments—little conversations, gentle gestures, and all the scenes where you can see exactly what’s happening, even if Olive is still charmingly clueless.
There’s a bit of a drawn-out misunderstanding, and the story takes a sudden detour into heavier workplace territory, which kept it from being an instant five-star favourite for me. But honestly, none of that stopped me from having a genuinely lovely time with this book.
Is it soft? Completely. Swoony? Without a doubt. Scientifically sensible? Well, that’s another story.
Maybe let’s not look too closely at that part.
📖 Story Snapshot — Spoiler Free
Meet Olive Smith: third-year PhD candidate, champion of science, and someone who finds comfort in things that can be measured, tested, and neatly explained.
As for lasting romantic love, well, Olive isn’t exactly sold on that idea. (Let’s just say she trusts lab results more than love stories.)
So when Olive finds herself needing to convince her best friend Anh that she’s well and truly over her ex, she does what any rational scientist would do in a moment of panic: she kisses the first person she spots in the hallway. That person just happens to be Adam Carlsen, the university’s resident grumpy professor, famous for his sharp critiques and his talent for making students wish they could melt into the floor.
Instead of running for the hills or reporting her to the academic authorities, Adam surprises everyone (including himself, probably) by agreeing to play along.
And just like that, they’re fake dating. Because what could possibly go wrong?
Their little arrangement comes with rules, scheduled check-ins, and a mutual agreement that feelings are strictly off the table. But as Olive’s research throws her curveballs and the future feels a bit wobbly, Adam starts to feel less like a temporary solution and more like someone she can actually lean on.
The more time they spend together, the blurrier the line gets between pretending and something that feels a lot like the real thing.
📚 My Reading Experience
☕ A Comfort Read Wearing a Lab Coat
If you could wrap yourself up in a story the way you do with your favourite soft jumper, this would be it—only with a dash of lab coats and a sprinkle of science.
There’s just something about fake dating, awkward humour, and a big, grumpy man who melts for exactly one person that feels like the literary equivalent of a warm hug. Sure, there’s a bit of academic stress and a few emotional knots to untangle, but the romance itself is all soft edges and easy comfort—like slipping into a story that wants you to stay a while.
I laughed out loud, squealed more than once, and honestly, there were moments when the secondhand embarrassment had me seriously considering using the book as a shield. (We’ve all been there, right?)
Olive has a knack for making choices that would make any sensible person raise an eyebrow, but somehow, when you’re in her head, her anxious logic feels perfectly reasonable. She overthinks, expects disaster at every turn, and tries to untangle her feelings with the same careful steps she’d use in a lab experiment. It’s both endearing and a little too relatable.
Of course, feelings have never been great at following the rules of scientific data. They tend to do their own thing, no matter how much you wish they’d cooperate.
Honestly, a bit rude of them.
🧠 Olive’s Anxious Brain Versus My Patience
Olive is one of those quietly brilliant, deeply caring people who somehow can’t quite see how much she matters.
She pours her heart into her work and absolutely belongs in her academic world, but there’s this little voice in her head always asking if she’s enough. And when Adam enters the picture, that voice doesn’t quiet down—it turns up the volume.
She’s got a whole catalogue of reasons for Adam’s kindness, none of which involve him actually liking her. Even as the signs start stacking up right in front of her, Olive is determined there must be some other, more sensible explanation.
Olive, babes.
The evidence was practically peer-reviewed.
At first, watching Olive miss every single clue about Adam’s feelings is honestly pretty funny. But after a while, I found myself wanting to gently nudge her and say, ‘Come on, love, it’s right there!’ The misunderstanding goes on a bit longer than my patience would have liked.
But honestly, it’s Olive’s vulnerability that makes her so easy to cheer for. Underneath all the awkward moments, there’s someone quietly grieving, fiercely protecting her research, and trying to build a future she’s not sure she’s allowed to have.
Seeing her start to find her voice and stand up for herself is one of those quietly triumphant moments that made me want to give her a little cheer from my sofa.
🖤 Adam Carlsen, Sir…
Adam has somehow managed to earn himself the title of the university’s resident nightmare, which is honestly a little impressive if you think about it.
He’s blunt, demanding, and has this uncanny ability to make students question all their life choices with just one look. He’s not exactly known for sugar-coating things or volunteering for anything that even hints at drama, let alone a fake relationship.
But then there’s Olive, and suddenly patience seems to be his secret superpower.
He remembers the little things. He notices when she’s not quite at ease. He helps out without ever asking for a gold star, quietly shifting his world to make space for her, all while acting like it’s the most ordinary thing in the world.
Honestly, the man doesn’t stand a chance.
Watching Olive come up with wild new theories for his every move, while Adam is basically wearing his heart on his sleeve for anyone (except her) to see, is equal parts adorable and a little bit heartbreaking.
His whole vibe could be summed up as:
“I’m terrifying to everyone except you.”
Tall, broody, and emotionally stuck on the outside. Secretly just a pile of marshmallow fluff on the inside.
Honestly, it’s game over for the rest of us.
🧪 Science, Pressure and Finding Your Voice
The world of STEM here feels like so much more than just a backdrop for the romance. It’s woven right into the heart of the story, giving everything a little extra spark.
You can really feel how much Olive cares about her research, and all the uncertainty swirling around things like funding, lab space, and what comes next for her. It gives the whole story a real sense of what’s at stake. There’s this constant hum of pressure—trying to prove yourself in a world full of competition and hierarchy, where the people around you can shape your future in ways big and small.
Think lab benches cluttered with notes, the ever-present stress of chasing grants, late-night experiments that blur into early mornings, coffee that’s always a little too burnt, and colleagues whose smiles don’t always reach their eyes.
All of it comes together to create this atmosphere that feels both real and just a little bit frantic—like you’re right there with Olive, trying to keep up.
Later on, the story takes a much heavier turn with the workplace harassment plotline—something that feels jarring after such a cozy start. It’s uncomfortable to read, and honestly, it should be. It really shines a light on just how vulnerable junior academics can be when someone higher up decides to use their power in the worst way.
That part of the book adds a lot of emotional weight to Olive’s journey, even if the shift in tone feels a bit sudden. It’s a reminder that even the coziest stories can have sharp edges.
🌌 Yes, I Saw the Reylo Energy
Was I picking up on those Kylo Ren and Rey vibes? Oh, absolutely.
It was all there, clear as day.
Adam is tall and a little bit intimidating, with that whole emotionally guarded thing going on. Olive, on the other hand, is small and sharp and never quite lets him settle into the version of himself that everyone else seems to accept.
Once you spot the connection, it’s honestly impossible to unsee. It’s like a little wink from the universe every time they’re on the page together.
Did that bother me, though?
Not even a little bit.
Honestly, I was more than happy to settle in with a giant, brooding scientist and his tiny, slightly chaotic researcher. Some equations just feel right the way they are.
⭐ What Kept It at Four Stars?
If I had to pick one thing that kept this from being a five-star, curl-up-and-sigh kind of read, it would be the long stretch of misunderstanding between the characters.
I completely got why Olive found it hard to believe Adam could really want her, especially with her confidence wobbling the way it was. But as a reader, Adam’s feelings felt so clear that I found myself quietly rooting for Olive to catch on—maybe even talking to the book a little, as if she could hear me. After a while, watching her miss the signs started to feel a bit like waiting for the kettle to boil when you’re desperate for tea.
There’s also a point where the story takes a turn into more serious workplace territory, and the mood changes almost in a blink. The topic is important and definitely deserves its moment, but the sudden shift made the last stretch feel a little different from the cozy, rom-com glow I’d settled into earlier.
Still, neither of these things took away from how much I enjoyed myself.
They just meant this one landed firmly in my ‘lovely four-star comfort read’ pile, instead of joining the ranks of my all-time favourites. And honestly, that’s not a bad place to be.
💘 Character Corner
Favourite Character: Adam
Most Compelling Character: Olive
My Fictional Crush: Adam Carlsen—obviously
Character Who Surprised Me Most: Adam, because the terrifying professor reputation hides an astonishing amount of softness
Character I Wanted to Protect: Olive
Favourite Dynamic: Olive assuming everything is fake while Adam quietly behaves like the most devoted real boyfriend imaginable
Biggest Red Flag: Olive and Adam’s determination to communicate through assumptions instead of actual sentences
Most Accurate Adam Description: A human thundercloud carrying emergency snacks for one specific woman
Most Accurate Olive Description: An anxious academic disaster attempting to apply scientific logic to a man who is already hopelessly in love with her
🧠 Olive Smith — The Sweetest Disaster
There’s something so endearing about Olive’s particular brand of messiness. It’s the kind that feels real and familiar, like the sort of chaos you only notice when you’re trying your best.
Olive’s chaos isn’t the careless kind. It’s the sort that comes from caring a little too much, overthinking every detail, and wanting to shield everyone she loves from even the tiniest bit of discomfort. The whole fake relationship thing? That’s just Olive, putting someone else’s happiness first (again). Her selflessness is stitched into every part of her story, even when it means she forgets to look after herself.
Sometimes Olive’s anxiety and self-doubt make you want to gently shake her (with love, of course), but that’s what makes her growth feel so special. She’s spent so long telling herself not to expect too much that when real love shows up, it almost feels like a trick.
Olive’s story isn’t just about falling in love (though that part is lovely). It’s about learning she deserves a seat at the table, trusting her own gut, and letting herself want things without immediately feeling like she has to say sorry for it.
🖤 Adam Carlsen — Terrifying to Everyone Except Her
Adam is the classic grumpy hero, all sharp edges on the outside but secretly soft where it counts.
He doesn’t magically turn into Mr. Sunshine just because Olive walks in. He’s still blunt, still a little intimidating, still the guy who could probably silence a whole room with one look. But Olive starts to notice the patience and softness tucked away under all that gruffness.
You can spot Adam’s feelings in the little things, if you’re paying attention.
It’s in the way he remembers her favorite snacks, the quiet help he offers, the way he always seems to make room for Olive without ever asking for anything back. And, let’s be honest, it becomes pretty clear that this whole fake relationship thing isn’t just about helping her out.
Adam could probably terrify a whole department with a single raised eyebrow, but let one small scientist smile at him and suddenly he’s showing up with snacks and shuffling his schedule around like it’s nothing.
Honestly, it’s the kind of thing that makes you want to cheer from the sidelines.
🔥 Relationships, Tension & Spice
💞 The Romance
Olive and Adam’s romance doesn’t arrive with fireworks or grand speeches. Instead, it quietly grows in the spaces between small, almost forgettable moments—the kind you only notice when you look back and realize how much they mattered.
Those fake coffee dates? They start out as awkward performances, but somewhere along the way, the conversations turn real and the affection stops feeling like an act. Olive, who’s supposed to be nervous around the campus legend, finds herself relaxing bit by bit. And Adam, who’s meant to be the reluctant participant, suddenly seems a little too good at playing along. Suspicious, right?
Sure, their height difference gives you all the classic romance vibes, but it’s the way they balance each other emotionally that really makes things sparkle. Olive is a champion at filling silences with anxious rambling, while Adam seems to have mastered the art of saying everything with a look or a small gesture.
Their banter is quick and clever, their awkward moments are the kind that make you want to hide behind your hands, and the tension? It builds just slowly enough to keep you grinning and maybe a little bit impatient.
You’ll probably catch on to Adam’s feelings long before Olive does, which means you get to enjoy that delicious, slow-burn agony of waiting for her to catch up. (It’s a little bit torturous, but in the best way.)
He fell first.
Olive, on the other hand, needs a few hundred pages, a mountain of evidence, and maybe a PowerPoint with animated transitions before she finally gets the memo.
🌶️ The Spice
Even though this is mostly a slow-burn kind of romance, the big open-door moment is a lot spicier than you’d ever guess from that sweet, illustrated cover.
There’s not a ton of spice sprinkled throughout—just enough for a single chilli on my rating scale. Most of the romance is all about longing, emotional closeness, and that delicious tension, rather than scene after scene of steam.
But when the spice finally shows up, it doesn’t tiptoe in. It makes an entrance.
That scene is detailed and intimate, but it’s also deeply tied to their relationship. It feels like the natural, much-needed release after all the longing and sidestepping they’ve been doing for most of the story.
For most of this little experiment, things stay sweet and just the right amount of awkward.
And then, all at once, the temperature in the lab goes up a few notches.
🎧 Audiobook Notes
Narrator: Callie Dalton
Callie Dalton really brings Olive to life in a way that feels both familiar and a little bit magical.
There’s this gentle, slightly breathless energy in her performance that matches Olive’s endless overthinking, but somehow never tips into overwhelming. She nails the awkward-funny moments (the kind that make you want to hide behind your hands) and brings a real softness to Olive’s more vulnerable scenes.
Adam gets a deeper, steadier voice from Callie, which is a lovely contrast to Olive’s nervous energy. He’s all calm and careful words, the kind of character who says more in his silences than most people do in a whole conversation.
Would I have loved a dedicated male narrator for Adam?
Absolutely. No question.
A second narrator (or, if we’re dreaming big, a proper duet) would have made the chemistry sparkle even more. Adam’s quiet, vulnerable moments would have felt even richer with a voice all his own.
Still, Callie’s performance is so inviting and easy to sink into. She balances the humour, the nerves, and the swoony bits with such care that I’d happily recommend this audiobook to anyone looking for a cozy listen.
But a deep, rumbly male voice for Adam Carlsen?
Please. All in the name of research, obviously.
💬 A Line I Had to Save
“Carry yourself with the confidence of a mediocre white man.”
✨ The Bookish Extras
📸 Meet Adam and Olive

My imagined version of Adam and Olive, created using AI from their character descriptions in the book.
🎵 The Soundtrack
Soft romantic longing, anxious late-night thoughts, quiet devotion and the musical equivalent of two scientists slowly realising that their supposedly fake relationship contains an alarming number of genuine feelings.
📌 Enter Olive and Adam’s World
Pink solutions in glass flasks, oversized lab coats, coffee cups, research notes, university corridors, rainy-day reading and one intimidating professor staring softly at the only woman capable of distracting him.
💌 You’ll Love This If…
You may enjoy The Love Hypothesis if you love:
- Fake-dating romances
- Grumpy × sunshine
- Slow-burn tension
- He-falls-first energy
- Intelligent but chaotic heroines
- Large, intimidating men who are secretly soft
- Academic or workplace settings
- Women-in-STEM stories
- Awkward humour
- Quiet acts of devotion
- Romantic misunderstandings
- Single-point-of-view romances
- Comfort reads with emotional depth
- Open-door spice with a long build-up
- Reylo-inspired romantic energy
- Standalone contemporary romances
You May Want to Skip It If…
This may not be for you if:
- Prolonged misunderstandings frustrate you
- Professor-and-student power differentials make you uncomfortable
- Workplace sexual harassment is difficult for you to read
- Secondhand embarrassment makes you want to hide
- You dislike heroines who overthink everything
- You prefer fast-burn romance
- You want frequent spice throughout
- You need dual points of view
- Fake dating isn’t your favourite trope
⭐ The Final Chapter
Would I Recommend It? Yes—especially to contemporary-romance and fake-dating readers
Would I Reread It? Yes, when I need a warm comfort read
Would I Read More From the Author? Absolutely
Did the Ending Satisfy Me? Yes
Favourite Character: Adam
Most Compelling Character: Olive
Favourite Element: Adam’s increasingly obvious devotion
Biggest Strength: The chemistry and slow emotional build between Olive and Adam
Main Weakness: The misunderstanding lasts longer than necessary
Best Format: Paperback alongside the audiobook
Audiobook MVP: Callie Dalton’s portrayal of Olive’s internal chaos
Audiobook Wish: A dedicated male narrator for Adam—or proper duet narration
Most Accurate Summary: A panicked PhD candidate kisses the university’s resident thundercloud and accidentally acquires a devoted fake boyfriend
Book Hangover Level: Mild urge to immediately find another giant grumpy scientist
Shelf Keeper? Yes
Overall Rating: ⭐⭐⭐⭐
🧪 Final Thoughts + Come Chat
The Love Hypothesis is the kind of book that wraps around you like your favourite blanket and a mug of something warm, with a side of fake dates that get more questionable by the chapter. Olive is clever and anxious, and she’s so busy convincing herself that Adam couldn’t possibly care that she manages to overlook a whole thesis-worth of clues. I’ll admit, there were moments when I wanted to gently shake her, but I also get it. When you’ve spent so long believing love isn’t meant for you, even the most obvious signs can feel like they’re written in invisible ink.
And Adam? He’s exactly my brand of grumpy romance hero. He doesn’t suddenly transform into someone else just because he’s fallen for Olive. He’s still quiet, still blunt, still a little bit intimidating, but you start to spot the softness sneaking in around the edges every time he does something thoughtful for her.
The fake dating setup works so well here because the feelings underneath never feel pretend. Their connection grows quietly, in all those in-between moments—the conversations that linger, the little details they remember, the reluctant smiles, and all the ways Adam quietly makes Olive feel like she matters.
There’s a more serious thread running underneath all the cozy romance, too. The workplace storyline shows just how vulnerable people can be when power and ambition get tangled up in the wrong ways. It shifts the mood pretty quickly, but it also gives Olive this big, important moment to trust herself—and to realise she doesn’t have to carry everything on her own.
This one didn’t quite make it to five stars for me. The drawn-out misunderstanding tested my patience a bit, and I found myself wishing for a gentler lead-in to the heavier parts at the end. But did I have a good time reading it? Absolutely.
It’s soft, funny, swoony, and packed with the kind of quiet devotion that makes a romance feel like a safe place to land. And if you listen to Callie Dalton’s warm audiobook narration, it turns into the perfect story to curl up with—light enough to help you unwind, but with just enough heart to keep you hooked.
Now come chat… Have you read The Love Hypothesis? Are you an Adam Carlsen defender for life, or did Olive’s determination to ignore the evidence test your patience too? And the most important question: if someone made you a perfectly organised fake-dating agreement, would you sign it—or would you immediately suspect they were already in love with you? 👀








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