The Soulmate Equation
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Overview
A Goodreads Choice Awards nominee for Best Romance and a Book of the Month Club Selection, The Soulmate Equation is Christina Lauren's most ambitious and irresistible romance yet.
Jess Davis has built her life around numbers. As a data and statistics wizard and single mom, she trusts what she can measure, calculate, and prove. Dating, on the other hand, is something she has quietly walked away from — and for good reason. Her father was never in the picture, her mother vanished when Jess was six, and her ex bailed before their daughter was even born. Jess keeps her circle small and her head down, working constantly just to stay afloat.
When she hears about GeneticAlly, a buzzy new startup using DNA to match people with their perfect partner, something clicks. Science. Data. Reliability. This is a language Jess speaks fluently. She signs up without expecting much — until her results come back with a compatibility score of 98 percent, a figure so rare it's practically unheard of.
The match? Dr. River Peña. GeneticAlly's own founder. A man Jess already knows — and already can't stand. Stubborn, aloof, and about as warm as a lab report, River is the last person she would have chosen. But GeneticAlly has an offer she can't easily refuse: spend time with him as their headline "Diamond" pairing, and they'll pay her for it. With bills piling up, Jess says yes, even as every instinct tells her this is a terrible idea.
What follows is a series of public appearances, awkward encounters, and unexpected moments that start to chip away at everything Jess thought she knew — about River, about the science of connection, and about what she's actually willing to risk.
"A sexy, science-filled, and surprising romance full of warmth and wit." — Kirkus Reviews (starred review)
Series Information
Series Name: DNA Duo
Series Reading Order
This series is best read in the order of publication, starting with 'The Soulmate Equation' followed by 'The True Love Experiment.' The character Fizzy, introduced in 'The Soulmate Equation,' is the focus of 'The True Love Experiment.'
Book 1, DNA Duo Series - The Soulmate Equation
Book 2, DNA Duo Series - The True Love Experiment
Awards and Recognition
Goodreads Choice Awards Nominee for Best Romance (2021)
Reviews and Author Praise
"Laugh-out-loud, sweet, charming, and humorous."
— Library Journal (starred review)
"Writing duo and reigning romance queens Christina Lauren are back with The Soulmate Equation, their most ambitious book to date."
— PopSugar
"A sexy, science-filled, and surprising romance full of warmth and wit."
— Kirkus Reviews (starred review)
"This latest romance by the duo Christina Lauren, following The Honey-Don't List (2020), is another winner."
— Booklist (starred review)
"Lauren (The Unhoneymooners) delivers a charming romance sparked by a DNA match... This is a sweet treat."
— Publishers Weekly
Topics and Key Themes
Narrative Tropes
Enemies to Lovers
Grumpy/Sunshine
Slow Burn
Opposites Attract
Fake Dating
Key Themes
Science versus the heart — a data-driven skeptic discovers love can't be reduced to a compatibility score.
Single mom letting her guard down — years of abandonment make trust feel like the biggest risk of all.
Emotional walls hiding warmth — a cold, aloof scientist slowly reveals the person beneath the lab coat.
Paid proximity sparking real feeling — a financial arrangement blurs the line between performance and genuine connection.
Chosen family over perfect origins — Jess builds belonging despite a childhood defined by people who left.
Who is this book for?
Primary Genre: Contemporary Romantic Comedy
Spice Level: 🌶️🌶️🌶️ 3/5: Spicy
Open-door romance with balance. You’ll find some on-page intimacy with moderate detail, woven into the story. A sweet spot for readers who enjoy both emotional depth and a bit of steam.
Fans of Emily Henry's Beach Read will enjoy the witty banter, slow-burn enemies-to-lovers tension, and heartfelt single-mom storyline wrapped in a clever high-concept premise.
About the Author
Christina Lauren is the combined pen name of longtime writing partners and best friends Christina Hobbs and Lauren Billings, the New York Times, USA TODAY, and #1 internationally bestselling authors of the Beautiful and Wild Seasons series, Autoboyography, Love and Other Words, Roomies, Josh and Hazel’s Guide to Not Dating, The Unhoneymooners, The Soulmate Equation, Something Wilder, The True Love Experiment, The Paradise Problem, The Romance Revival, and In a Holidaze. You can find them online at ChristinaLaurenBooks.com or @ChristinaLauren on Instagram.
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Reader FAQs
The Soulmate Equation sits at a moderate spice level. It includes romantic and sexual content but is not graphic. Readers who find very explicit romance too much, or very clean romance too little, will likely find the heat level comfortable.
The two share witty banter and slow-burn tension, but The Soulmate Equation adds a high-concept science premise and a single-mother storyline. Henry's prose tends toward deeper introspection; Christina Lauren's approach here is lighter and more plot-driven.
The book is written for an adult audience. It features adult relationships, moderate sexual content, and themes around parenthood and abandonment. It is best suited to readers aged 18 and above.
The romance is slow-burn. The enemies-to-lovers dynamic develops gradually through forced proximity and a paid arrangement, with emotional walls on both sides taking time to come down. Readers who prefer tension that builds steadily will find the pacing satisfying.
The book deals with parental abandonment, childhood neglect, and the emotional impact of being left by both parents. There is also a single-mother storyline involving financial stress. These themes are handled with warmth rather than as primary sources of tension.
Info
ISBN: 9781982171117
Published Date: February 1, 2022
Publisher: Gallery Books
Language: English
Page Count: 416
Size: 8.19" l x 5.25" w x 1.34" h
Category
Fiction