Love, Theoretically Review: The Third STEM Romance, Ranked

Is Love, Theoretically the best of Ali Hazelwood's STEM romances? Here's an honest review, comparing it to The Love Hypothesis and Love on the Brain.

8/3/20263 min read

Love, Theoretically Review: The Third STEM Romance, Ranked

Three books into her STEM romance lane, does Ali Hazelwood still have new ground to cover? Here's my honest take on Love, Theoretically, and how it stacks up against my Love Hypothesis review and Love on the Brain review.

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Quick Answer

Yes, and I'd actually rank this as my favorite of the three. Elsie's double life as an adjunct physicist and professional fake girlfriend gives this book a sharper premise than either of its predecessors, and the central relationship carries real thematic weight around authenticity and identity that elevates it above straightforward rom-com territory.

What It's About

Elsie Hannaway survives as a broke adjunct physics professor by moonlighting as a professional fake girlfriend, presenting a carefully curated, agreeable version of herself to strangers for money. Her carefully separated lives collide when she's hired for a new job — only to discover the "boyfriend" role requires convincing the family of Jack Smith, a colleague at the university where she's desperately hoping to land a permanent position, and whose brother happens to be the source of most of Elsie's professional misery.

My Honest Take

I think this is Hazelwood's most thematically ambitious book in the STEM romance trilogy. Elsie's entire arc is built around the tension between the curated, agreeable persona she performs for money and academic survival, and who she actually is underneath that performance — and I found that theme genuinely well-integrated into both the romance and the professional plot, not just a surface-level character quirk.

Elsie is the most complex heroine of the three STEM books. Her professional fake-girlfriend job isn't just a fun premise — it's directly tied to her core conflict about authenticity, people-pleasing, and the exhausting performance required to survive in a hostile academic job market. I found her arc more emotionally resonant than either Olive's or Bee's.

Jack subverts the "gruff love interest" pattern in a way I appreciated. Without spoiling specifics, his role in the story complicates the formula Hazelwood established in her first two books, and I think that subversion is one of the book's smartest choices.

The academic job market commentary feels genuinely lived-in. Hazelwood's own academic background shows clearly here — the precarity, the politics, and the specific exhaustion of adjunct work are rendered with real specificity rather than generic "grad school is hard" gestures.

The dual-identity premise occasionally strains believability. I'll be honest: keeping the fake-girlfriend gig and her academic life fully separate requires some suspension of disbelief once the plot mechanics kick in. I don't think this significantly hurts the book, but it's worth naming.

What to Know Before You Start

You don't need to read the other two STEM books first. This is a standalone with no plot connection to The Love Hypothesis or Love on the Brain, though tonally it fits the same lane.

The professional/personal identity theme is central, not just background. If you want pure light rom-com without deeper thematic weight, know this book leans further into that territory than her earlier work.

It shares structural DNA with her other STEM romances. If you wanted something completely different from Hazelwood's established formula, this isn't a major departure, even with its stronger themes.

Who Should Read This

  • Fans of the STEM romance lane who want the most thematically rich entry

  • Readers who appreciate heroines with real internal conflict beyond the central romance

  • Anyone who enjoys academic-set romance with genuinely lived-in industry commentary

Who Might Want to Skip It

  • Readers who specifically want something structurally different from Hazelwood's established formula

  • Anyone who prefers lighter, lower-stakes rom-com without deeper thematic ambition

Amazon link: Love, Theoretically by Ali Hazelwood

Frequently Asked Questions

Is this the best of Hazelwood's STEM trilogy? In my opinion, yes — Elsie's arc and the authenticity theme give it more depth than the other two, though all three are strong entries.

Do I need to read The Love Hypothesis or Love on the Brain first? No, all three STEM romances are standalones connected only by tone and general style, not plot or characters.

Is the fake-girlfriend premise similar to fake dating in her other books? It's related but distinct — this one's professional, transactional framing gives it a different flavor than typical fake dating tropes.

Final Thoughts

Love, Theoretically closes out Hazelwood's STEM romance trilogy on its strongest note, in my opinion — Elsie's identity-driven arc gives the book real emotional stakes beyond its central romance, elevating it above straightforward rom-com territory. If you've read the other two and are deciding whether to continue, this is the one I'd recommend most.