SOON TO BE A PRIME ORIGINAL FILM! • Ali Hazelwood’s swoony instant New York Times bestselling novel—now in a beautiful movie tie-in edition featuring:
• All-new foreword from Lili Reinhart • A cover with exclusive movie art • Adorable art printed inside the front and back covers • Both bonus chapters from Adam’s perspective
A fake relationship between scientists meets the irresistible force of attraction.
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.
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The Love Hypothesis is a captivating hardcover collector's edition praised for its engaging romance, relatable story, and well-developed characters. Customers appreciate its humor, science elements, and the fun additional features like the new art and chapter headings. The book is highly recommended for those seeking a feel-good read with depth.
"I loved the way the author wrote this storyline and characters, such a good read!" — Scarlett D.
"Love the story and the romance." — Lauréanne
"It’s a very interesting book with lots of interesting love scenes and would be good if you love hardcore romance" — Hershey
Reviews
Great read!
"Cannot believe I waited so long to read this Ali Hazelwood masterpiece. She ties in science and romance so beautifully and I loved this book!"
— Shannon (5/5)
Academic fake dating cuties
"Such a cute fast past read with a couple of cutie science nerds! Great first book to read Ali Hazelwood."
— Beka (5/5)
Top Tier
"This book is one of my top tier book list. It's very silly and funny with a woman in stem"
— Jules (5/5)
Grumpy meets sunshine in the best way possible
"I absolutely loved this book so much that I bought the collector editions after it came out, and it's so worth it because it makes the story even more special. Olive and Adam's chemistry feels so real, Olive is such a relatable main character, and Adam is the perfect grumpy nerdy love interest. The banter, the tension and the emotional depth are so well balanced that I couldn't stop smiling while reading it."
— Aurélie (5/5)
A fun but accurate title for the storyline! Romance and science!
"An easy read that lets readers feel like they are the main character! I love the setting and characters. A must read!"
— A. S. (5/5)
Great read!
"I loved this book! It was really intense but also sweet."
— Jennifer (5/5)
Fun and Enjoyable!
"Entertaining read. Certainly cheesy but you already knew that for a rom com book. Can’t wait for the movie to come out"
— Erin (4/5)
A Romance That Reignited My Love for Reading
"The Love Hypothesis was such a joy to read. It honestly got me back into reading after a long slump. Ali Hazelwood does a fantastic job balancing humor, romance, and heartwarming moments. I loved the dynamic between Olive and Adam, the witty banter, and the slow-burn chemistry that kept me hooked from start to finish. It’s the perfect feel-good romcom with a touch of depth, and I can see why it’s become such a favorite among readers."
— Ilana S. (5/5)
Basic but Cute
"Adam lacks a fully fleshed out personality, but this book is very entertaining."
— Kiwi (3/5)
At this point The Love Hypothesis should be a romance classic…
"The Love Hypothesis is really a stand out of Ali’s titles. Maybe because it was the first of hers I read and I’ve read each new title as they’re published since but The Love Hypothesis just has a special place in my heart. Ali does grumpy/sunshine, he falls first and many other tropes so well and her romance formula is a comfort for me."
— Bronwen E. (5/5)
Q&A
Published date: Sep 08, 2026
Language: English
No. of Pages: 416
Publisher: Penguin Publishing Group
ISBN: 9798217195633
Dimensions:
5.5" W x
0.844" L x
8.25" H
Praise for Ali Hazelwood
“The reigning queen of STEM romance.”—The Washington Post
"Ali Hazelwood is a romance powerhouse.”—#1 New York Times bestselling author Hannah Grace
"Passionate and witty and primal in its intensity."—New York Times bestselling author Nalini Singh, on Bride
“Contemporary romance's unicorn: the elusive marriage of deeply brainy and delightfully escapist.”—New York Times bestselling author Christina Lauren
“Hazelwood proves that she is the perfect writer to show that science is sexy as hell, and that love can ‘STEM’ from the most unlikely places.”—#1 New York Times bestselling author Jodi Picoult
“Funny, sexy and smart, Ali Hazelwood did a terrific job with The Love Hypothesis.”—New York Times bestselling author Mariana Zapata
“Gloriously nerdy and sexy, with on-point commentary about women in STEM.”—New York Times bestselling author Helen Hoang
Ali Hazelwood is the #1 New York Times bestselling author of Mate, Problematic Summer Romance, and The Love Hypothesis, as well as a writer of peer-reviewed articles about brain science, in which no one makes out and the ever after is not always happy. Originally from Italy, she lived in Germany and Japan before moving to the US to pursue a PhD in neuroscience. When Ali is not at work, she can be found crocheting, eating cake pops, or watching sci-fi movies with her three feline overlords (and her slightly-less-feline husband).
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