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: 7.85

407 RATINGS

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Community Reviews

What Bookclubbers are saying about this book

✨ Summarized by Bookclubs AI

Readers say *The Soulmate Equation* is a charming, light romance with a unique DNA-based matchmaking twist, featuring sweet, evolving relationships an...

The.readrose
Jan 28, 2026
8/10 stars
Maybe a 4.5/5! So good!!
TheCleverReader
Feb 03, 2023
8/10 stars
This book was adorable. I really enjoyed the concept and the characters. I've never read an adult romance where the main character was a single parent and I thought that was a refreshing change of pace for me. Juno is so much fun and I hope my daughter is just as fun and creative as she is.

I'm a sucker for enemies to lovers tropes and this one did not disappoint. I thought their "meet not so cute" was great and Jess really portrayed her annoyance with River. It was fun to see how their relationship evolved throughout the story and he was so sweet. They both navigated all the limelight well and stayed focused on each other.

The side characters were fun and really lightened up the story. Her best friend Fizzy cracked me up so much. Who wouldn't want a romance writer friend who isn't afraid to tell you that when you need some to go get some! She was definitely the voice of reason that helped push Jess to be more open to her situation and to River. It was a great friendship.

Jess's family, other than her mother, was so supportive and I enjoyed the love her grandparents had for each other. I think it's important to show healthy relationships to balance out the bad ones. I thought that adding the negative relationship Jess had with her mother felt realistic and lent to Jess's hesitation with letting people in.

This was the perfect adult romance for me right now. I am so glad I had the opportunity to read and review it. I definitely recommend it to anyone looking for an adult romance that is light and fluffy but also touches on the important things in life.
Kacey
Jan 15, 2026
4/10 stars
I honestly couldn't get behind the relationship between River and Jess. Seemed like there was basically no chemistry. I appreciate Fizzy's support, but she's just way too cheesy. Also, the pacing was a bit odd. Just "meh" all around.
Bosky
Dec 30, 2025
2/10 stars
I was not a fan of this book and was an outlier... lol. Being married to a statistician family perhaps biased me. Statisticians are sought out. If you are a woman and a statistician and you can't get jobs, then I'm sorry- you are a BIG loser. And she never got a Masters or a PhD in statistics? Then how can you be a statistician...? Ugh. Lots of problems with this one. Read to the end for the 'jokes'.
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

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