A
Ali Hazelwood
Italian neuroscientist and writer of romance novels.
The Love Hypothesis
As a third-year PhD candidate in biology at Stanford, Olive Smith is sure of two things: experimental data, and the idea that romantic love is a fiction people tell themselves. So when she needs to convince her best friend that her own love life is thriving, she panics and kisses the first man she sees — who happens to be Adam Carlsen, a young, brilliant, notoriously unapproachable professor.
To Olive's surprise, Adam agrees to keep up the fake-dating charade; he has reasons of his own for wanting the department to believe he's settling down. What begins as a tidy arrangement grows complicated as conference travel, lab politics, and Adam's unexpected steadiness start to blur the line between performance and feeling.
Ali Hazelwood's debut is a warm, funny STEM rom-com about a heroine who trusts her hypotheses more than her heart, and the grumpy academic who makes her want to revise them.
A PhD candidate who kisses a stranger to fake a relationship and ends up fake-dating a notoriously unapproachable professor.
A brilliant, grumpy professor with his own reasons for the fake-dating arrangement.
The Love Hypothesis is a standalone romance novel, meaning readers can enjoy the full story without needing to read any other books by the author to understand the plot or characters.
Yes — a film adaptation from Amazon MGM Studios, directed by Claire Scanlon and starring Lili Reinhart as Olive and Tom Bateman as Adam, premieres on Prime Video on September 23, 2026. It's the first screen adaptation of an Ali Hazelwood novel.
The Love Hypothesis shares a similar tone and focus on STEM-related protagonists and academic settings with Ali Hazelwood's subsequent works, establishing a consistent style in her romance novels.