Grumpy Billionaire’s Fake Engagement: An Enemies to Lovers Billionaire Fake Engagement Romance

by Katie Chance

Grumpy billionaire. Fake engagement. One don’t fall in love.

I told off a billionaire in his own lobby.
Then I accidentally became his assistant.
Now he wants me to fake an engagement.

Ethan Brandt is cold, calculating, and infuriatingly gorgeous—the kind of billionaire CEO who doesn’t ask… he commands.

Here’s the
I pretend to be his fiancée.
He gets his inheritance.
I get my paycheck.

No feelings.
No strings.
No problem.

Easy.
Right?

Except every glance sizzles.
Every touch blurs the lines.
And pretending we’re in love starts to feel dangerously real.

Now the only thing more dangerous than our fake relationship…
is what happens when it ends.

✨ Inside this steamy billionaire romance, you’ll

✔️ Grumpy billionaire CEO with a heart he swears he doesn’t have
✔️ Sassy assistant who doesn’t follow orders—or keep her distance
✔️ Enemies to lovers with forced proximity
✔️ Fake engagement, real chemistry
✔️ From scraping by to penthouse views
✔️ One bed. One rule. Zero self-control. 😏
✔️ Slow burn tension with an explosive payoff
✔️ Guaranteed happily-ever-after

If you love grumpy sunshine, fake relationships, workplace romance, and alpha billionaires who fall hard—this one’s for you.

Standalone steamy romance. No cliffhanger. Guaranteed HEA.

💎 Welcome to the Billionaire Romance Collection—where powerful men fall hard and forever.

Start with Ethan’s fake engagement… then meet the next irresistible billionaire.

321 pages, Kindle Edition

Published December 4, 2025

Reviews

[Yaffa Koff · Rating 1 out of 5]

I really wanted to love this book! The first chapter started off strong, but then there were so many issues with continuity. Plot points didnt follow or make sense...seemed like chapters were written out of order and then the book didnt follow as a whole.

[Kayla Berger · Rating 5 out of 5]

A Billionaire Romance Worth Every Page

I absolutely loved this book from the very first page. I read it in two hours and couldn’t put it down once. The chemistry and banter between Jesse and Ethan were incredible. The way he chose her over everyone and everything was just perfect.

I read a lot of billionaire and mafia romance books, and this has become one of my favorites. It was absolutely incredible from start to finish. I’m left wanting more—especially to know what the future holds for Jesse and Ethan. If a sequel or novella ever comes out, I would read it in a heartbeat.

I highly recommend this book if you’re looking for an amazing love story with an engaging plot that keeps you wanting more. I’m so grateful the author allowed me early access to this amazing story as an ARC.

[Tori · Rating 4 out of 5]

I read this book as an ARC… Ethan and Jesse’s story was full of a slow burn, banter filled, chaotic mess. The witty, smart mouth Jesse met her match in Ethan. She meets him in her way to an interview after bumping into and covering him in hot coffee. Only to find out she would be seeing Ethan soon. The fires they have to go through may or may not make them stronger in the end. I loved the banter and the way they handled themselves. It was quick good read, with a little spice. But, the question of all… do they make it through the fire to come up on the other side better off than they started. The twist and turns will have you guessing.

[Catherine Pafford · Rating 5 out of 5]

Grumpy Billionaire’s Fake Engagement is an irresistible blend of sharp banter, sizzling chemistry, and heartfelt emotion. Katie Chance delivers a captivating enemies-to-lovers romance where every moment between the leads crackles with tension and charm. The fake engagement trope is executed with wit and freshness, making the slow shift from obligation to genuine connection deeply satisfying. With its engaging characters, fast-paced plot, and perfect balance of humor and heat, this novel is a wonderfully addictive read from start to finish.

[Sara Beth Lyon · Rating 3 out of 5]

2.75⭐️ It took me nearly 3 weeks to read this book that I really wanted to love and has so much potential, but there were so many issues with the plot in the beginning that eventually seemed to even out … but just took so much away from the whole story. Also, the constant string of lies between the characters was rather aggravating. It did end ok and that saved the book from a lower rating.

** I received an ARC copy of this book in exchange for an honest review. **

[Adam Marketing · Rating 5 out of 5]

Absolutely addictive and steamy! Grumpy Billionaire’s Fake Engagement by Katie Chance is a fun, flirty romance that had me hooked from start to finish. The enemies-to-lovers chemistry between the icy billionaire and his witty new assistant is chef’s kiss — the banter, tension, and slow burn are executed perfectly, and the fake engagement setup keeps you turning pages.

[Shannon Crawford · Rating 4 out of 5]

Fun quick spicy read. I did feel like a lot happens off page, which at times I was confused about. A more light hearted billionaire romance was nice to read. Most the man is always so angry and this grump wasn't too bad.

[Stanley Lynsey · Rating 5 out of 5]

Sharp, sizzling, and impossible to put down! Ethan Brandt is the ultimate grumpy billionaire, and the heroine’s fire makes every scene electric. Fake engagement, slow burn, and a perfect happily-ever-after this romance hits every note.

[Kat Nocke · Rating 4 out of 5]

Great book. Ended my reading slump and finished it in just a few hours.
An interesting twist of events and the switch between point of views was a great way to intertwine both stories beautifully.