The Soulmate Equation

INSTANT NEW YORK TIMES BESTSELLER

“Writing duo and reigning romance queens Christina Lauren are back with...their most ambitious book to date.” —PopSugar

Chosen as a best pick by Bustle, Marie Claire, Entertainment Weekly, E! Online, PopSugar, BuzzFeed, Goodreads, Country Living, The Pioneer Woman, Woman’s World, Bookish, Bookreporter, Frolic, and more!

The New York Times bestselling authors of The Unhoneymooners and Love and Other Words return with a witty and effervescent novel about what happens when two people with everything on the line are thrown together by science—or is it fate? Perfect for fans of Abby Jimenez.

Single mom Jess Davis is a data and statistics wizard, but no amount of number crunching can convince her to step back into the dating world. After all, her father was never around, her hard-partying mother disappeared when she was six, and her ex decided he wasn’t “father material” before her daughter was even born. Jess holds her loved ones close but working constantly to stay afloat is hard...and lonely.

But then Jess hears about GeneticAlly, a buzzy new DNA-based matchmaking company that’s predicted to change dating forever. Finding a soulmate through DNA? The reliability of numbers: This Jess understands.

At least she thought she did, until her test shows an unheard-of 98 percent compatibility with another subject in the database: GeneticAlly’s founder, Dr. River Peña. This is one number she can’t wrap her head around, because she already knows Dr. Peña. The stuck-up, stubborn man is without a doubt not her soulmate. But GeneticAlly has a proposition: Get ‘to know him and we’ll pay you. Jess—who is barely making ends meet—is in no position to turn it down, despite her skepticism about the project and her dislike for River. As the pair are dragged from one event to the next as the “Diamond” pairing that could launch GeneticAlly’s valuation sky-high, Jess begins to realize that there might be more to the scientist—and the science behind a soulmate—than she thought.

“Laugh-out-loud, sweet, charming, and humorous” (Library Journal, starred review), The Soulmate Equation proves that the delicate balance between fate and choice can never be calculated.

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Published Feb 8, 2022

416 pages

Average rating: 7.87

361 RATINGS

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Community Reviews

aisabel
Jun 22, 2023
10/10 stars
river & jess have my wholeeeee heart
abookwanderer
Oct 09, 2025
10/10 stars
CLo have done it again! I have yet to read a book by Christina Lauren that I have not enjoyed, but The Soulmate Equation lands nicely in my top three favorites.

I’m afraid this review is going to be short and messy. I devoured The Soulmate Equation, forgetting to take notes or highlight favorite parts, reading just for enjoyment. And it was so much fun.

The authors have taken the current DNA craze and put a fun spin on it by using science to find soulmates. My math and science-adverse brain can’t even start to comprehend how this would ever be possible. In fact, I’m assuming it’s pure fantasy. But even all those scientific terms and mathematical equations couldn’t keep me from loving this one!

The chemistry between our two main characters is palpable. While River may come across as rude or dismissive in the beginning, I trusted that there would be a story behind his behavior, and it only helped to build the anticipation for when these two would finally admit their attraction. I fell so hard for this pairing, dreading the event that would potentially separate them. Let’s be honest, there’s always an event—and it’s what keeps us reading.

As with most CLo books, the supporting cast helps to make the story what it is. And The Soulmate Equation has a wonderful one. From Jess’ grandparents to her adorable daughter, Juno, to River’s two sisters, I enjoyed all the heart poured into these characters.

I found myself laughing out loud, especially at the dialogue between Jess and her best friend, Fizzy. We so need a book about Fizzy now. It just HAS to happen. She’s snarky, fun, genuine, and loyal. And I wanted more of her story.

When I realized The Soulmate Equation was wrapping up, I was distraught, wishing I could stay in their world a little longer, but also happy that maybe the lack of an epilogue meant we’d get more of their story someday… maybe?? Please!

Thank you to Gallery Books and Netgalley for an advanced reader’s copy.

Check out my full review and book playlist at A Book Wanderer

#popsugarreadingchallenge2021 (prompt #3 - A book that has a heart, diamond, club, or spade on the cover)
Alina
Sep 24, 2025
6/10 stars
3.5 stars. didn’t enjoy the conflict in the end and how it was handled
Ava Robbins
Sep 14, 2025
8/10 stars
slow at the beginning and River ghosting Jess for 8 days after a crisis was BANANAS but overall this was a charming story
Eneke Van Marle
Jul 16, 2025
8/10 stars
it was sooooo good! i’m in love with river and his with relationship with jess and her daughter. the book was really well written and once it started picking up, i didn’t want to put the book down

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