Skip to product information
1 of 1

The Love Hypothesis

by Ali Hazelwood

Regular price $20.00 USD
Regular price $0.00 USD Sale price $20.00 USD
Sale Sold out
Book cover type
Quantity

The Instant New York Times Bestseller and TikTok Sensation!

When a fake relationship between scientists meets the irresistible force of attraction, it throws one woman's carefully calculated theories on love into chaos.

As a third-year Ph.D. candidate, Olive Smith doesn't believe in lasting romantic relationships--but her best friend does, and that's what got her into this situation. Convincing Anh that Olive is dating and well on her way to a happily ever after was always going to take more than hand-wavy Jedi mind tricks: Scientists require proof. So, like any self-respecting biologist, Olive panics and kisses the first man she sees.

That man is none other than Adam Carlsen, a young hotshot professor--and well-known ass. Which is why Olive is positively floored when Stanford's reigning lab tyrant agrees to keep her charade a secret and be her fake boyfriend. But when a big science conference goes haywire, putting Olive's career on the Bunsen burner, Adam surprises her again with his unyielding support and even more unyielding...six-pack abs.

Suddenly their little experiment feels dangerously close to combustion. And Olive discovers that the only thing more complicated than a hypothesis on love is putting her own heart under the microscope.

New Movie Coming Soon from Amazon MGM Studios

Hardcover collector's edition includes:

- A shimmering, revamped cover
- Endpapers with all new art from Lilith Saur featuring Olive and Adam
- STEM stenciled edges
- A sunny, foil stamped case
- Fun additional chapter heading doodles throughout, and...
- A brand new bonus chapter featuring THAT KISS from Adam's point of view

Book Details

ISBN
9798217195633
Binding
Paperback
Authors
Ali Hazelwood
Publisher
Berkley Books
Published Date
September 8, 2026
Language
English
Pages
416
Physical Info
1.1 in H x 8.2 in L x 5.5 in W (1.45 lb)
View full details
  • 5 stars: 13 (65%)
  • 4 stars: 6 (30%)
  • 3 stars: 1 (5%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
M
MARIA JOSE RODRIGUEZ
Good

I’ve already read this book before and I completely love it! This was my first time ordering paperback from amazon and the U.S in general and the quality it’s a little disappointing (not this book specifically, just paperbacks in general) It’s my bad tho, I thought the covers were going to be more steady(?It’s price-quality, in Colombia paperbacks have more structure but they are more expensive.

E
Emily k.
Funny and Romantic

This book was quite interesting and the beginning is one of those that will get you hooked straight from the start, I love the characters and how they strive in the field. But it’s one of those books where the main character is always expressed how big the guy is constantly throughout the book, but other than that, I enjoyed this book and I plan on reading others by this author.

L
Lauren
The Love Hypothesis Review

From Lala’s Book ReviewsTW/CW: sexual harassment, cancer, absent parents while growing up, foster homeLook, if you’re even slightly thinking about getting this book to read, just go a head and do it because you defiantly won’t regret it, and if you have the book and thinking about reading it, just go a head and put down your current read and start this one. Because, a) it’s a super fast read, b) it’s highly addicting, and c) Adam and Olive’s relationship/banter is the best.Yes, I bought this book because of all of the hype that has been going around on bookstagram and booktok as partly because of the cover because it’s just the cutest.The Love Hypothesis has a very simple style of writing to it, and I’m not saying that in a negative way. The simplicity of the writing makes this slow flow in a steady way without any of those moments of wanting to skip entire pages or chapters to look for the story to pick up. I feel like sometimes when the writing is very over-the-top it’s a way of trying to compensate for the book lacking in some area from world building or character development, and the content of The Love Hypothesis is honestly one of the best books I’ve read this year and doesn’t need all of the glitz and glam that some books exudes. I think it also helps reflect the way that STEM fields see their work in a very black or white way even though getting to those points are anything but simple.From the very beginning of the book, I was pretty much hooked and by the time I got to like chapter 2 or 3, I knew that there was no way that I wasn’t going to finish this book. I literally had to make myself put this book down at times so I could be productive instead of binge reading. The Love Hypothesis honestly made me laugh so many times because Olive is one of the very few people who is able to bring about some emotion other than the typically broodiness from Adam, and his reactions and her actions are just hilarious.Olive found herself fake dating Adam in attempt to get her best friend Anh to see that Olive is over her ex Jeremy, so they can start dating because Anh wouldn’t make a move because of the bestie code, and Adam happened to be at the right place at the right time when Anh was walking through the building when Olive grabbed Adam kissed him very unexpectedly.One thing leads to another and *bam* they’re faking dating to not only prove that Olive has moved on but to also help Adam with the college. It’s like painstakingly awkward at first because Adam has a very real reputation on campus and the science field of being a very strict instructor who kind of has a habit of making students cry and drop out because of his not so nice constructive criticism, and even though Adam is very nice on the eyes and has a personality under his tough science exterior, it’s still very shocking to say the least.Their fake relationship progresses pretty well and they become actual friends in the process, and Olive has found someone to collab with her on her project, and that person just so happens to be one of Adam’s friends.Just as the date come for them to break-up, a lot of things happen with their relationship and something huge happens to Olive that makes her have to act quickly even when she doesn’t want to.Despite Olive being a relatively quiet, awkward person, she’s always able to put Adam in his place when his tough academic side is showing. She’s a hardworking student, a caring best friend, and committed to everything she sets her mind to doing.Adam is just *swoon*. He is in a very committed relationship with his job and takes it very seriously. He is this very straightforward person who doesn’t hold back except when it comes to his feelings with Olive. It’s very obvious that he cares for Olive because even though he puts up a “fight” towards some things he gives in and wants nothing more than to she her happy, and it’s just the cutest to see this man become so love-struck.

F
Fabiola Colon
Una comedia romántica inteligente y adorable que te atrapará desde la primera página 💕📚

The Love Hypothesis es una novela que combina ciencia y romance con un toque fresco y divertido. La protagonista, una estudiante de doctorado, se embarca en una relación falsa con un profesor para convencer a una amiga, pero lo que comienza como un engaño se convierte en algo mucho más real y entrañable.La historia está llena de diálogos ingeniosos, momentos emotivos y química palpable entre los personajes. La autora logra equilibrar la tensión romántica con la vida académica y científica, haciendo que la lectura sea entretenida y relatable.Perfecto para quienes disfrutan de romances contemporáneos con personajes bien desarrollados y una narrativa ágil. Ideal para leer en cualquier momento, especialmente si buscas una historia que combine humor, inteligencia y corazón.

B
Bee
Amazing book but a small warning

I bought this book when I heard the movie was in production. It was on my tbr FOREVER and I just kept pushing it to the bottom. Arrived quickly with amazing quality. The art inside is amazing, I love the sprayed edges, and the foil lettering. I’d definitely throw in a warning that there is mention of sexual harassment and sextortion- but it is handled amazingly and as someone who’s experienced SA- I would say it was handled well in its depiction through the MC’s eyes.

C
Cynthia L.
A beautiful book

Loved it. Adam is amazing, I couldn’t stop reading. It is amazing how this book help me when I wasn’t have the inspiration to continue reading

J
Justine
cute story

Cute book, I wish there wasn’t so much of a miscommunication, but liked the story, the banter and characters. I wish we had a little more time with them together because I liked it so much!

A
AmandaM
swoon! loved this story and the characters

Hazelwood nailed this sweet story- the magnetism and chemistry between Olive and Adam gripped me right away. Even the side characters made me want to dig deeper into this universe.

M
Mandy
absolutely fantastic

This was a great read! I was hesitant bc of all the science, however the author Ali does an amazing job explaining the concept. She also makes the story more about the romance. If you like angst, you will read this more than once! It’s so amazing!

H
Heather C
love this book

What a great romance story ! Very entertaining and kept me turning the pages wanting more!! Loved the build up of the characters !!!

G
Gracie
Ripped dust jacket

Decided to buy the collectors edition from Amazon instead of going to the bookstore. The dust jacket came ripped at the top of the spine. Love the actual book but having a ruined shelf trophy… :(

M
Misty korb
Romcom💅

I don’t typically reach for anything but fantasy, but this book was picked for my book club this month and I’ve devoured it in a couple hours.It was so cute, so feel good. Not the heavy, spiky twists of a romantasy, but something softer, more real. ⭐️⭐️⭐️⭐️⭐️

A
Allison
So this is was a mature love feels like

2 things bc it’s night and i have a fitness class tomorrow:1. Re reading this book now that the movie making is on process 😭2. This is what being in a mature relationship looks like ❤️ where you grow together and heal. Adam , this book, was the first of many where I could finally understand how an emotionally available man acts like with the woman he truly loves and considers the one. And this.., is beautiful and had etched into my memory and now idea of love. Thanks :)

T
Tarah
Peer-Reviewed and Collector-Approved

I first read The Love Hypothesis back in August 2022, and it quickly became one of my all-time favorites. So when I heard a collector’s edition was being released, I didn’t even hesitate—I needed it. And wow, it absolutely delivers!The redesigned cover is even more stunning in person, and the foil-stamped book sleeve makes it feel like a true keepsake. The new endpapers, featuring beautifully illustrated scenes of Olive and Adam by Lilith Saur, are a perfect touch. I also loved the STEM-inspired stenciled page edges—such a clever detail!Inside, there are cute, nerdy chapter doodles scattered throughout, which made the reading experience even more fun. But the real treat? A bonus chapter with that kiss, this time from Adam’s point of view. Trust me, it’s everything fans could want and more.This edition is a book lover’s dream—thoughtful, gorgeous, and completely collector-worthy!*************************************************************🎧Audiobook review from August 2022🎧If you told me a fake-dating, science-loving romance would have me rooting from the prologue, I’d have raised an eyebrow—then immediately hit play on the audiobook. Ali Hazelwood’s The Love Hypothesis hooked me so hard I’m pretty sure Adam and Olive moved into my brain rent-free. Olive’s adorably nerdy charm and her journey to embrace both her scientist smarts and womanly confidence had me cheering her on throughout the whole book!And then there’s Adam. A hot, smart guy with a dry sense of humor and surprisingly great bedroom skills. Honestly, what more could you ask for?The audiobook really brought the story to life. Teddy Hamilton’s voice made Adam impossible not to love, and Callie Dalton captured Olive perfectly. If you want a romance that feels real and fun, this one’s a winner—especially on audio.

x
xmazcarroll
academia rom-com

4⭐️ honestly, i wasn’t sure how much i’d enjoy this one, but i had a great time reading it & i didn’t put it down. the science stuff can be a bit much in this series, BUT i like science, AND i’m a grad student (not science but law) so i felt really seen in parts of this novel. genuinely just a fun little romance and a great way to spend an afternoon/eveningtropes: graduate school, fake dating, student-teacher romance2🌶️ standard romance spice. slow build up w/just a few scenes towards the end. i could’ve gone for more, but what i got was exactly what i expected from a mainstream romance that doesn’t fall into the erotica category. the only “iffy” thing is the student-teacher aspect of it, which 1 he isn’t her teacher, & 2 i just love that trope (call me toxic idc). tropes: student-teacher

J
Jessica C
liked it

I liked this book. 3.5 star for rating, 1.5 for spice. I felt it dragged a bit in places, but overall it was good. The STEM aspect was enjoyable. And Iiked her relationship with her friends.Before reading this book, I heard people saying it was unrealistic that people at Stanford could be inept or shy or whatever. As someone who works in STEM and has interacted with people at all sorts of universities and biotech, including Stanford, I can tell you that humans will be human everywhere, prestigious university or not.

C
Cathleen Kay
I Love This Book

I first read this book over a year ago, and I’ve revisited it at least three times now.The Love Hypothesis is a contemporary romance set in the world of academia and told from the perspective of PhD student Olive Smith.Olive possesses several traits that make her my favorite type of lead character—intelligence, resilience, and understandable flaws. She’s imperfect, but that gives her room to grow during the story. Hazelwood provides us with enough background to understand why Olive fears abandonment and feels a need to lie (she’s an orphan who lost her mother tragically and who struggles with relationships), but the plot never becomes weighed down by exposition.Instead, the story jumps straight into a fake dating arrangement between Olive and the broody but brilliant Professor Adam Carlsen. If you’re looking for popular fake-dating tropes, this has what you need (forced proximity, sharing a room, pining, almost-strangers to friends to lovers). The lead characters share humorous and awkward moments as they try to act like a couple, but they also have heartfelt interactions.While still occasionally “antagonistic and unapproachable,” Adam encourages Olive as she works on her projects and seeks new research opportunities. At the same time, you can see Olive help Adam to address some of his own fears and challenges. They help each other to find their best selves—even if they still have to overcome a few hurdles before they realize what they truly need.Adam’s character growth may seem more subtle than Olive’s, but that goes back to the point of view. We see the story from Olive’s perspective. If you want more insight into Adam’s character, I highly recommend the bonus chapter from Adam’s point of view (available on the author’s website or in the audiobook). The first time I read the story, I went through this bonus chapter at the end, and I believe it added to my experience. Even without this chapter, though, Olive’s story and growth are moving, and knowing the reveals at the end of the book, I would recommend re-reading this one a second time.One area that gives some readers and critics pause regarding this book relates to Olive’s sexuality. Olive struggles to define her sexuality, and I’ve read reviewers who believe she shouldn't have described her sexual uncertainty as having something “wrong” with her in one particular scene. I can understand where these reviewers are coming from, but I can also understand why Olive made these comments. It goes back to the flaws she’s dealing with from the beginning of the book. She lies to others—and to herself—to try to protect herself and not lose people. In the moment in question, she doesn’t want Adam to leave her, but she doesn’t know how to describe her sexual needs. Olive is not yet honest with herself or with Adam (because she’s still learning lessons at this point of the book), and I believe this is why Olive defines herself this way. She still needs to learn there is nothing “wrong” with her, and that people can love her without her telling lies.Content Warnings: There is one scene with explicit sexual content (or two if you count the bonus chapter), and characters discuss sex at other times. There is also an assault, but not within the main pairing.Audiobook: I’ve listened to the audiobook narrated by Callie Dalton with the bonus chapter read by Teddy Hamilton, and I enjoyed listening to the narration at normal speed.Adaptations: A film adaptation of this book is currently in pre-production, so I may update this review once it’s released.Lastly, for the Reylos out there (and I count myself among you), you’ll be able to see parallels between the pairing you love and the leads in this book, and you may have an easier time picturing the cast of characters. However, you don’t have to be a Reylo to enjoy TLH.I highly recommend this book to any fan of romcoms in need of a fake-dating/pining/triumph-of-the-underdog story.If You Liked This Book: You may want to try Hazelwood’s Love on the Brain, which also features an intelligent female lead and fun romance tropes.Happy Reading!

A
Amy
A Sweet, Spicy, STEM-Centered Romance

I think I put off reading this for so long because all the hype scared me. But let me tell you, it totally SURPASSES the hype!First, we need more books with women in STEM. And we need to see their struggles because they're real and everyone deserves to be seen in fiction. Ali's accurate portrayal of Olive's and Anh's experiences will help shed light and break down barriers. I didn't need to understand the science to completely love that aspect.On that note, this book flirts beautifully with a broad commercial audience and a very niche one. Well done!Second, this is told solely from Olive's POV and that was a brilliant choice. The voice is so unique and specific and very Olive that I almost forgot it was written in the third person. It's charming and quirky and enhances the story.Does that mean Adam comes off a little hard to read or understand? Absolutely. But watching Olive tease out details, learning about him alongside her, is part of the joy of this story. And because we don't have the same blind spots Olive has, we can see how much he cares for her WAY before she does. Being with her as she finally figures it out was delightful.Third, and this is my favorite part, the demisexual representation is incredible and so very necessary. While it exists in Olive's coding and isn't ever said, it's rare to find it done so well. And Ali is masterful at it! It makes sense that Olive would repeat certain things (like Adam's size or how hot he is) -- she's never experienced this kind of interest or attraction before and she's learning about it.The secondary characters are great -- I want a Malcolm in my life -- and the pacing is lovely. I thoroughly enjoyed it and will recommend it to everyone!

J
Jess
Absolute PERFECTION!!!!

Alright you guys... Buckle up because this review is going to literally just be a random conglomeration of thoughts I typed out while reading this incredible book.First off... when I tell you I was giggling like a madwoman, screaming into an empty house laughing and also crying (both sad and happy tears)??? NO. JOKE.I LOVED the STEM in this book. As a science major (technically exercise science, but still close enough to where I took classes well into the science field), this was brilliant and so insanely fun to read! This setting was awesome because it was a school setting, however the ages were older than fresh into college. It was brilliant!When I tell you this book had all the best tropes in one... oh my god. Seriously!!!!! Grumpy hero, sunshine heroine, fake dating, slow burn... plus MORE??? Yes. I did say there's more! Isn't it wonderful??Before I go into more depth of my love for the main characters, I have to say the friendships and side characters in this book were amazing! I loved the combined group of friends from both Olive and Adam. They were so endearing and lovable and I can't wait for books about them (because there was definitely the hinted possibility for some of these characters to have their own books... I will do anything for more books of these characters by this author!!!)!Alrighty. Now onto some of my favorite characters: Olive and Adam. Like don't even get me started on this being a reconstructed Reylo story, because my heart legit sings for that!!! You can totally see the inspiration in these characters and it's incredible!Olive: this girl was just downright awesome. I would adore being her friend. And she is not only an incredible girl, but an outstanding friend. She is so selfless. The lengths that she goes through to make sure her best friend is happy is so heartwarming and you just can't help but fall in love with her heart because it is just pure and sweet.Adam. Freaking. Carlsen. That's it. He's perfect. The perfect broody man. PERFECT. PERFECT. PERFECT.Here's a glimpse into my brain during a scene:Adam... muscles... lotttttts of muscles... moving a truck with a dead battery... the sweat... What I wouldn't give to have Adam Carlsen call me a smarts with a small grin or smirk... To answer that question, I would give literally anything.Can you tell this broke my brain?The way that Adam cared for Olive (in all ways... wink wink) was absolutely beautiful. He learned her so well and was able to be the support and love she hadn't had in so long. And it broke my heart just as much as it halted it because my goodness... it was the sweetest thing to see him being everything he possibly could be for her. And only her.Alright, as you can tell, I easily became absolutely obsessed with this book. I have been looking forward to it ever since I first heard about it (before it became popular on the social media platforms, yes I'm very proud of that thank you very much) and it absolutely lived up to and absolutely exceed and obliterated all expectations I had. This book has engrained itself in my brain and my heart and is an all time favorite that I will be sure to force people to read for the rest of my life because it is sheer perfection.

J
Jeeves Reads Romance
Absolutely loved it

I loved this SO VERY MUCH. It's one of those books that left me smiling like a fool, with a full heart and a strong desire to start reading it all over again. The evolution of these characters from start to finish is intense, and I absolutely loved how everything came full circle by the end. One of my favorite parts of the story was trying to decipher our hero's quiet looks, moods, and glances - there is some outstanding subtlety to this love story. And it is definitely a love story. The romance is central throughout, with a light, fresh feel that gets richer and deeper as the story progresses. It tackles difficult subjects like sexual harassment and self-worth, while also remaining exceedingly light and uplifting for much of the book. And by the end? I was content, happy, and oh so satisfied to finally see these two fools get together.The story follows Olive, a 26-year-old grad student trying to cure cancer. She is still finding her confidence, but she loves what she's doing. So when Olive's best friend develops feelings for the guy Olive just started dating, she does the logical thing... kiss a random man to make her friend believe that it's all okay. Or at least that seemed logical at the time. Turns out, the random stranger that Olive kissed is none other than the most hated professor around, Adam (34). And while Olive has no desire to spend time with Adam, her impulsive act means that entering a fake relationship with the man is actually a good idea. But as the two get to know each other better, Olive discovers that the mercurial, moody professor might just be a sweetheart underneath his broody exterior.This is one of those books where the love story is SO completely unique. It's awkward, science-filled love - and I adored every minute of it. Sure, Olive might've been a bit too peppy and upbeat for me at the beginning, but that's all part of her character evolution. I loved the grumpy/sunshine dynamic, and Adam becomes such a swoonworthy cinnamon roll by the end (with a little bit of alpha gruffness). It's a slow burn romance with one incredibly intimate and dynamic love scene - the intimacy and emotional connection are the shining stars here. Well, it's all pretty great, actually. This has such a vivid, distinct voice that I am very much looking forward to whatever's next from Hazelwood.Audio note: I switched back and forth between the audio and the ebook throughout - and the audio was excellent. This is told exclusively from Olive's point of view, so there's one narrator. She did a great job. The vibe feels young and fresh, with a voice that actually sounds like a 26-year-old. As a slow burn romance, this is perfect for listening at work - there's nothing steamy until later on, and the story is light and easy much of the time. Your only issue will likely be that work will take a backseat to listening, lol. The runtime is a bit longer than I'd like (11 hours), and I found it difficult to listen to the narrator's voice at a faster speed. I have no desire for the book to be shorter though, so just know that it may take awhile to get through. Overall, an excellent audiobook to go with an incredible read.