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LoveSpark Duet #1

The Chemistry Clause

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She’s chasing her big break. He’s the last person she wants to fake-date. But when sparks fly, the line between pretend and possible starts to blur…Emma Hart finally had a chance to land the promotion she's always wanted. There’s just one she has to team up with Nathan Crawford—the charming, infuriating golden boy who also happens to be her older brother’s high school best friend.

Their mission? Pretend to fall in love using the LoveSpark app. Smile for the cameras. Sell the chemistry.

The problem? Their history is complicated, their tension is combustible, and the more they fake it, the more real it starts to feel.

With gala nights, cozy photo shoots, and one impossible-to-ignore connection, Emma’s carefully guarded heart is suddenly on the line. But trusting Nathan again might cost her more than just the campaign.

A swoony slow-burn filled with banter, longing glances, and a fake romance that just might be the real thing.

The Chemistry Clause ends on a cliffhanger and is Book One of the LoveSpark duet. Emma and Nathan’s love story concludes in The Engagement Contract. - available on May 20th!

364 pages, Kindle Edition

Published April 16, 2025

1 person is currently reading

About the author

Ivy Sinclair

45 books133 followers
Ivy Sinclair cut her romance teeth on classics like Gone With the Wind, Casablanca, An Affair to Remember, and Sabrina. She is a firm believer in true love, a happily ever after ending, and the medicinal use of chocolate to cure any ailment of the heart. Ivy's guilty pleasures include sushi, endless Starbucks lattes, and wine. Readers of Ivy's stories can expect smoldering sweet stories of romance that tug at the heartstrings.

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Displaying 1 - 7 of 7 reviews
Profile Image for Ashlee.
27 reviews
June 11, 2025
From the very first page, The Chemistry Clause immediately pulled me into the curiosity surrounding Nathan and Emma’s shared history. There’s something about the lingering mystery of their past that keeps you turning the pages, needing to know more.

Personally, I found myself deeply connected to both main characters. I am very much an Emma—Type A, always prepared, always planning for every possible outcome (often to my husband’s frustration). My husband, on the other hand, is a complete Nathan—laid-back, go with the flow, but deeply considerate and always tuned in to the smallest shifts in body language. This made their dynamic incredibly relatable for me, almost like I was reading my own love story.

What made this story shine was the banter between Emma and Nathan. Their playful, sharp, and natural exchanges brought the relationship to life in such an authentic way. I loved watching their connection grow—not just together but individually, as both characters experience their own arcs of personal development.

While the book does not include spice scenes, it still offered a rich, emotionally driven romance that felt intimate and real. I truly enjoyed this story and it honestly felt like reading a version of my own marriage. My husband and I are happily married today, and I can’t help but root for Emma and Nathan to find that same lasting happiness as their journey continues.

The book closes on a cliffhanger, which left me anxiously awaiting the next installment. I need to know what happens next.

Feedback for the Author:
I would have loved to dive deeper into the characters' backstories. I related to Emma and Nathan so strongly, but at times, I felt like I didn’t fully know them yet. I would have loved to explore more of their past heartbreaks, childhood experiences, and the life events that shaped who they are today. That extra layer of depth would have made me feel even more connected to their journey.

Also, Zoe was an absolute standout. I adored her as a side character and cannot wait to see her story unfold further.

I received an advance review copy for free, and I am leaving this review voluntarily.
Profile Image for Lindsey.
409 reviews22 followers
July 23, 2025
The Chemistry Clause delivers exactly what it promises: a slow-burn romance with swoony moments, sparkling banter, and enough tension to keep the pages turning. Emma and Nathan’s dynamic hits familiar beats—enemies-to-lovers, fake dating, sibling’s best friend—all wrapped up in a glitzy, app-driven premise that feels tailored for fans of modern rom-coms.

Emma is a relatable, career-driven protagonist, and her chemistry with Nathan is palpable, if occasionally over-rehearsed. The story shines most in its quieter moments—shared glances, unexpected vulnerability, and the blurred line between pretense and reality. The LoveSpark app adds a fun, if slightly underdeveloped, twist to the fake-dating trope.

Where the book stumbles is in its predictability. Many plot turns feel telegraphed, and some emotional stakes (especially Emma’s past with Nathan) could have used more depth. The romance, while charming, plays it safe and never quite breaks free from its formula.

Still, for those craving a cozy, trope-filled escape with likable leads and a guaranteed HEA, *LoveSpark* is a solid pick. Just don’t expect too many surprises along the way.

I received an advance review copy for free, and I am leaving this review voluntarily.
81 reviews
April 23, 2025
Emma works at a marketing firm in Chicago. The new creative director is Nathan, a boy she went to high school with and is her brothers best friend. Emma is disappointed that she didn't get the job and that she has to share a huge pitch and potential client with a boy she previously had a crush on. The pitch is for a dating app that is based on the science of connections. Working together the two of them get to know each other and they struggle to manage their chemistry.

I enjoyed the story and the writing was excellent. My struggle is that the characters didn't have enough backstory. Emma is super type A and driven, why did she get that way? Why is she so afraid of Nathan. Same with Nathan. I felt like we got to know him better. We learned about his soccer injury and meet an ex. I was frustrated that the book includes the brother's best friend troupe, but over half way through the book we still didn't meet their families and I didn't understand what Nathan's relationship with Emma's brother. If they weren't close anymore, then why wasn't Nathan just guy she knew from high school.

I received an advance review copy for free, and I am leaving this review voluntarily.
Profile Image for Dena.
79 reviews
April 20, 2025
I liked this book. I liked the premise, and I liked the characters. It was fun and easy to read. Sometimes, I felt like the narrative lost a bit of drive because the tension was pretty low, didn't build a huge amount, and then skyrocketed just before the end of the book. I'm not sure if more backstory about how they knew each other in high school, or more drama about being brother's friend would have helped. Or, just more tension between the main characters themselves, or with the work setting. That said, overall, I would recommend this book.

I received an advance review copy for free, and I am leaving this review voluntarily.
373 reviews5 followers
May 29, 2025
Emma works at a marketing firm in Chicago. The new creative director is Nathan, a boy she went to high school with and is her brothers best friend. Emma is disappointed that she didn't get the job and that she has to share a huge pitch and potential client with a boy she previously had a crush on. The pitch is for a dating app that is based on the science of connections. Working together the two of them get to know each other and they struggle to manage their chemistry. I really enjoyed reading The Chemistry Clause and I’m looking forward to reading the second part when it is released.
Profile Image for Melissa.
7 reviews
June 14, 2025
The Chemistry Clause is a clever romantic comedy where ambitious copywriter Emma is forced push herself past the boundaries of her perfectly organized 5-year career path. As her childhood crush, Nathan, literally crashes into her workplace, she has to find a way to balance a high-profile contract and her heart. The book is full of witty banter, an annoyingly observant best friend, and copious amounts of coffee. I can’t wait to read more!

I received an advance review copy for free, and I am leaving this review voluntarily.
Profile Image for BookishKayCee.
27 reviews9 followers
May 18, 2025
ARC Review

The Chemistry Clause- Fun, Flirty, fake dating
For the sake of earning an important add campaign, Emma finds herself whisked into a fake relationship with Nate, her brother’s high school best friend. The same Nate that she once had a huge crush on (and still might), and showed up a few days ago in the office receiving the work promotion she’s worked countless hours trying to earn herself.

Coffee shop, Rock climbing, French cooking class, and escape the room were just the beginning for their “fake” dates. Their chemistry was so good that the client hired, and insisted, that Emma and Nathan continue their relationship for 6 additional months. This starts to get tricky for both as the lines begin to get blurred between fake and real feelings.

Emma manages to keep her guard up, even though others are insisting she needs to trust the process and not chance missing out on Mr. Right, just because she got burned by Mr. Wrong before. As weeks go on even Emma can’t help but start to wonder if there just might be a chance for them to be the real thing. She eventually gives into Nathan’s request of a real relationship even though she has many doubts. It isn’t until his ex girlfriend shows up with some interesting information and a questionable video that Emma realizes her intuition may have been right. If only Nathan could have a chance to explain….
Displaying 1 - 7 of 7 reviews

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