Jump to ratings and reviews
Rate this book

Only the Devil

Rate this book
I've survived combat zones and classified missions.
But watching her walk into danger? That might kill me.

The assignment seemed pose as a dutiful boyfriend while she infiltrates a finance mogul’s operation. Keep her safe. Keep my distance. Get the evidence and get out.

Simple, until the mogul hired me as his personal security.

Now I have a front-row seat to his empire of greed—and his predatory interest in the brilliant woman I'm supposed to be pretending to love. Every day I watch him dangle millions in front of her like bait, testing her limits, pushing her boundaries.

The problem? My feelings for Daisy stopped being pretend the moment she treated me like I was more than just another soldier following orders.

She thinks she can handle Sterling's world. She thinks she can resist the temptation of life-changing money. But I don’t trust wealth and power. And when bodies start dropping and cryptocurrency millions vanish overnight, I realize we're not just hunting a white-collar criminal.

We're trapped in his web.

Daisy's got secrets she won't share and a past that makes her desperate enough to risk everything for justice. Sterling's got enough money to buy loyalty, silence, and alibis. And me? I've got a heart condition that ended my military career and feelings for a woman who might be playing a deeper game than either of us signed up for.

In a world where everyone has their price, I've found the one thing I won't her safety.

Even if it costs me everything.

Only the Devil is the second standalone novel in the explosive Sinful State series, where wealth, power, and desire collide in the shadows. Return to the world of the elite KOAN Security Group in this romantic suspense thriller that proves not all fortunes are made in heaven.

372 pages, Kindle Edition

Published December 4, 2025

1 person is currently reading
9 people want to read

About the author

Isabel Jolie

43 books520 followers
Apple Books Contemporary Romance Bestselling Author of spicy thrillers where love always wins. Get free books + early access: https://isabeljoliebooks.com/#newsletter

Heart-pounding romance. Unforgettable heroes. Sizzling happily-ever-afters—with a side of suspense that'll keep you up way past bedtime.

I dreamed of being a writer as a kid but took the "safe" route: journalism degree, advertising career, MBA, corporate gigs at Chase and Universal. Then in 2020, I said screw it and published my first book. Twenty-five books later, I'm living the dream.

I'm also a mom to two teenage daughters who are perpetually mortified by my career choices. My husband's an entrepreneur whose latest product is Nampons (yes, it rhymes with tampons and yes, it's for nosebleeds). Between my spicy romance and his biz... we've cornered the market on parental embarrassment.

My books feature tough characters facing tougher choices, compelling suspense, and storylines that'll make you think. But no matter how dark things get, my people always choose love.

Follow me wherever you love to scroll:
https://www.instagram.com/isabeljolie...
https://tiktok.com/@Therealisabeljolie
https://www.facebook.com/isabeljolieb...
https://www.bookbub.com/profile/isabe...
https://www.goodreads.com/author/show...
https://www.pinterest.com/isabeljolie...


Ratings & Reviews

What do you think?
Rate this book

Friends & Following

Create a free account to discover what your friends think of this book!

Community Reviews

5 stars
25 (80%)
4 stars
6 (19%)
3 stars
0 (0%)
2 stars
0 (0%)
1 star
0 (0%)
Displaying 1 - 27 of 27 reviews
1,027 reviews6 followers
November 11, 2025
Intriguing and addictive read.

I was hooked in to Daisy and Jake's story from the very first page, and eagerly kept turning the pages until the end. The intrigue, drama, tension and self-reflection was fascinating and addictive and I found myself completely embroiled in the unravelling story. The characters were strong, complex and multi-faceted and I found myself empathising with the dilemmas they faced. I loved the growing friendship and more that Jake and Daisy fell into while working undercover, and the chemistry and intimate scenes between them was a real highlight. A very thought provoking and insightful read.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
577 reviews8 followers
November 6, 2025
Getting Justice And Finding Love
Wow! The second book In this series is just as good as the first: suspense, greed, romance, strong characters and a financial world most people know nothing about. Jake, a former SEAL, tough as nails but forced to a quieter life because of physical problems and Daisy, a programmer with a zeal, because her ‘uncle’ died under suspicious circumstances, go undercover together to find out what really happened. The story takes us into a world where life’s values are tested and every choice has complications. How true to the world we live in. A strong link to Arthur Miller’s Death of a Salesman.
You won’t regret reading this book, I enjoyed it tremendously!
I received a free copy of this book and am voluntarily leaving a review.
Profile Image for Demi.
1,412 reviews32 followers
November 23, 2025
Once again a couple I am truly invested in and a storyline that keeps you on the edge of your seat! Jake agrees to be security for Daisy as she goes undercover. This story leads you through murder and corporate greed all the while never knowing who the culprit is, or if there is a culprit at all. So well written becomes a quick read that is hard to put down!
Profile Image for kate.
93 reviews11 followers
November 19, 2025
Another gripping novel by Isabel Jolie, Only The Devil is book 2 in the Sinful State Series and focuses on Daisy and Jake who we met in Only the Wicked. Daisy is a kick-butt computer wunderkind who works for ARGUS and Jake is an operative for KOAN. Hired by Rhodes to watch out for Daisy while she attempts to uncover the truth around her uncle’s death, Jake’s former military and KOAN spidey senses are on high alert. Daisy is soon ensconced in the web of a clearly corrupt crypto-currency company and Jake, posing as her boyfriend to keep her safe, realizes that the danger is deeper than he thought - not just this shady company’s criminal underbelly but his falling hard for Daisy.

What a ride! I don’t know why I keep thinking I’ll be able to read one of Isabel Jolie’s book in my spare time. I read at least five chapters while standing in front of the open dryer with clean laundry in it. Getting to know Jake was amazing - when we met him in Only the Wicked, he seemed like an over grown kid, goofy and into video games. But we immediately realize that he is a complex guy with demons and depth. As his admiration for Daisy develops into friendship and then love, I definitely swooned a bit. Daisy is more than just a spitfire of a coder with a chip on her shoulder. Her childhood and her relationship with her mother continue to shape her in ways that, while she recognizes, she has a hard time letting go. Her attempts to be a strong and independent (and thus un-hurt) woman while investigating a truly dangerous company and keeping her feelings for Jake at bay naturally are unsuccessful. The feelings part. Which means we get spicy scenes. Which are awesome.

I know very little about crypto-currency, but like a curmudgeonly badger have been wary of it for years. This book definitely delves into another timely topic in a thoughtful and interesting way. Isabel Jolie clearly did her research and navigates the intricacies of investment firms and crypto in a way that makes this confusing subject accessible and absorbing. Twists, turns, danger, love, Only the Devil has it all. Grab this book, buckle in, and enjoy the ride!

I received an advance review copy from the author, and I am leaving this review voluntarily. All opinions are my own.
Profile Image for Han.
218 reviews3 followers
December 7, 2025
Holy cow - I’ve yet to read a book by Isabel that I haven’t devoured! Even with my very limited knowledge of the tech/crypto/finance world, this book was phenomenal! The suspense was at an all time high and I was hooked from the very beginning. Daisy and Jake are the absolute perfect couple as they both are very intelligent and strong characters. I really enjoyed Jake’s backstory of his military lifestyle before he joined KOAN. This book had a little bit of everything - suspense, murder, and secrets.

Coming from a military background, Jake is rough around the edges and extremely protective of Daisy. When he’s hired to take on bodyguard duty to protect her, this man is a force like no other. From the beginning, the connection between these two is evident as tension starts brewing. He’s a brute and 100% all man, but when it comes to Daisy he melts at the seams. His personality switches were a perfect dose of both worlds. Even though he was protective, it was never overbearing as Daisy was fully capable of taking care of herself.

Daisy is such an intelligent woman - creating computer codes and software like it’s easy. When she discovers a fraud scheme, her abilities are put to the test and boy does she not disappoint. Her and Jake together were the ultimate power couple as their intelligence put together was no match for anyone. She’s a force just like Jake often times putting herself in danger to uncover the truth. She fought like hell to get justice for wrongdoing and I think we can all appreciate that.
Profile Image for Kristy C..
153 reviews
November 25, 2025
ARC Review 4.5 ⭐️

Only the Devil is the second book in the Sinful State series, and while you can read it as a standalone, I recommend starting with book one to really get the full dynamic between Daisy, Rhodes, and the rest of the team.

This story follows Daisy, a brilliant programmer whose world flips after her uncle loses his life savings to a shady investment firm—and later dies under suspicious circumstances. Determined to expose what’s really going on, she goes undercover at the company, taking a job to help build a market-prediction program.

Rhodes knows she’s walking into something dangerous, so he assigns her a bodyguard. Enter Jake—her “fake boyfriend” and temporary roommate. Forced proximity + slow-burn chemistry = inevitable feelings, all while Daisy gets pulled deeper into the firm’s secrets.

As the stakes rise, Daisy finds herself facing some tough choices that push her to really examine where her moral lines are.

I loved the mix of romance, mystery, and suspense. Jolie delivers great chemistry and tension, while also weaving in questions about ethics, ambition, and justice. Daisy feels real and layered, and Jake brings the perfect balance of protective and steady.

A fast, addictive read that keeps you hooked and makes you think. Can’t wait for the next one!
Profile Image for Floraljoy.
1,120 reviews
December 5, 2025
Enjoyable:
This was a lovely second addition to the series and it can very much be read as a standalone. It lagged a bit midway but I enjoyed the suspense and action at the end. I also wish that the rest of the KOAN team had of been featured more as I had liked getting to see them interact and work together in the prior book. The focus this time around was mainly on Jake and Daisy. In addition to navigating their romantic feelings, they had to grapple with moral dilemmas such as personal ethics, ambition, and justice. I was a little disappointed in some of the decisions Daisy made and she'd waver and seemed to contradict herself. However I was pleased with her personal growth and glad that these found each other.
I received a free copy of this book and am voluntarily leaving a review. All opinions expressed are solely my own.
Profile Image for Zelda.
1,452 reviews
December 4, 2025
We met Daisy & Jake in Only the Wicked, the first book the Sinful States series. The characters are interconnected but this book can be read as a standalone. Daisy has left her employer to uncover what actually happened to her girlhood father figure. Luckily for her, her boss is more friend than employer and provides her with personal protection by way of Jake. I’ve not read many stories with a wealth gap where the FMC is the moneyed character. I really loved how their values aligned and that people and integrity were more important than the pursuit of wealth. The villains come in many forms so the suspense in finding out what was really going on was constant. Well-written, evenly paced, intriguing story.
28 reviews
November 14, 2025
Daisy and Jake were destined, just like Daisy’s Horoscopes. LOL There’s a slow burn as Jake breaches Daisy’s mile thick walls. Her family seems to only use her for the money she sends them, so why should anyone else care for her? But when you’re occupying the same small apartment, hearts might open up. But that’s not all. Daisy is undercover in a situation she doesn’t understand, and Jake’s got her back. Everything isn’t always as it seems, and they work great together trying to solve the case. There’s lots of tense action in the conclusion. Like every Isabel Jolie book, you’ll hang on every page. I’m so glad I didn’t miss this one.
2,650 reviews32 followers
December 4, 2025
I'd give this ten stars if i could. It was a remarkable story. Action and romance, suspense and twists.

When Daisy does undercover, Jake must act as her boyfriend. But soon things get out of control when events happen.

I really enjoyed the suspense in this book. Edge of your seat type of suspense that had me trying to read faster to keep up. The affection between Daisy and Jake grew as the odds changed, and the stakes were so much higher.

Beautifully written. I have so much respect for this author and the word she puts down. The danger, drama, and amazing relationships that come through keep me involved. So good!!
Profile Image for Didi.
1,842 reviews
December 7, 2025
Another fantastic draw-you-in-until-the-end book from this author. Daisy is taking her computer skills into a company that she believes caused her uncle’s demise. Jake is hired to protect her. From there we have a masterful story of corporate greed, corruption, betrayal and on the edge twists. Amidst this, we have the slowburn banter filled sizzling romance between Jake and Daisy. While this can be a standalone, I do recommend reading the first book to understand the dynamics of Daisy, Rhodes, and the rest of the Security team. Cannot wait for more in this series.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Book Addict.
729 reviews4 followers
November 23, 2025
A mix of romance and intrigue following Rhodes' programmer friend/employee Daisy and a KOAN employee Jake as they take on a powerful Cyrptocurrency fraudster. The author creates constant tension, and it seems danger lurking in every interaction with the secondary characters. Jake's protector instincts create both slow burn chemistry and lead to emotional entanglements. But it's the thrill of the who'dunnit that works for this one...

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
5,464 reviews
December 2, 2025
I absolutely loved this story!

The slow-burn romance had me glued to the pages!
I loved both Jake and Daisy!
I'm betting you'll love them too!

Relatable characters!
I didn't want to leave them!

Daisy's investigating the death of her Uncle Reed!
Her boss hires protection for her!

Things heat up!
The fake relationship, well hmmmm!

Intriguing, emotional, steamy! Excellent!

Ms. Jolie continues to hit it out of the park for me!
Home runs multiple times at bat now!!!
Profile Image for BecReadReview.
1,846 reviews34 followers
December 3, 2025
Daisy and Jake drag you onto a wild roller coaster of scams, greed, betrayal, and murder. Their fun, flirty, and unexpectedly vulnerable attraction is a slow burn that eventually erupts into flames. The tug-of-war between wants and needs stirs the devil in everyone as Daisy faces brutal choices.

Jake’s honesty, loyalty, and fierce protector instincts shine through, roaring to life the moment Daisy is threatened. Easy camaraderie, heartfelt emotion, tightly wound suspense, and a hard-earned HEA make this a beautifully intense ride.
Profile Image for Heather.
560 reviews9 followers
December 4, 2025
Isabel Jolie has written another gripping story full of suspense, action, intrigue and, most importantly, romance. Jake and Daisy have fierce chemistry, and their relationship is gripping and intense. And Jolie has once again given readers a plot with of-the-moment concerns, this time finance moguls and cryptocurrency. The characters are immersed in a world of infinite wealth—with all of its poisons and pitfalls. “Only The Devil” is a page turner you won’t be able to put down.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Patti Rapozo.
88 reviews2 followers
December 4, 2025
Wow, I didn’t think Izzy could top Only The Wicked, but she did. Jake and Daisy’s story (adventure) is so good. With its twists and turns and the fact that they are kind of opposites to begin with, this book takes you through it all. There is so much I could say, but you really need to read this book for yourself. You are going to love it. I couldn’t read it fast enough to get to the end and find out where the twists and turns were taking me. Can’t wait for the next book in the series. Izzy, you have set the bar really high!
328 reviews1 follower
December 3, 2025
Another intriguing, fast paced story from Isabel Jolie. Daisy eager to find answers to her uncle’s death, she goes undercover at Sterling, the financial company she believes responsible. Her boss, worried for her, hires, Jake, ex Seal to make sure she is safe. As they dig deeper into the company, feeling development between the two of them. This is the second novel in the Sinful State series, this one was every bit as suspenseful and page turning as the first.
1,568 reviews12 followers
December 5, 2025
Only the Devil is the 2nd book in the Sinful State series, but can be read as a standalone. I loved Daisy and Jake's story with its action-filled suspense, explosive chemistry as well as the witty dialogue. As an added element it delves into the push-and-pull between sticking to personal beliefs and giving in to temptation. A fascinating page-turner that kept me glued to the pages. I was fortunate to have received an early copy and am leaving this review voluntarily and honestly.
3 reviews
December 5, 2025
Wow what powerful story of Daisy trying to find proof of Sterling Financial company. She is a smart programmer. Jake is working for KOAN and is hired by her former boss to protect her. The story is very fast moving-I could not put it down. This book has it all..intrigue and a love story. It is a book that keeps you guessing-never saw the ending coming. Highly recommend.
Isabel Jolie is a fantastic author and her stories never disappoint.
Profile Image for Merry Jelks-Emmanuel.
13k reviews152 followers
December 6, 2025
Talk about intense! This reads like a motion picture where you need popcorn and drinks. It is action-packed filled with thrilling twists and turns that had me on the edge of my seat all caught up in the book and by the time I get to the end my heart was pounding. Jake and Daisy had me in their corner for sure.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Sue Smith.
726 reviews6 followers
December 3, 2025
Book 2 in the Sinful State Series, Daisy and Jake's story is not to be missed.
I thoroughly enjoyed reading this one, guessing all the way through how the clues fit together..... who to trust and who were the bad guys!
Brilliant storyline with wonderful characters and loved the HEA.
I received an ARC copy of this book, and I'm willingly leaving an honest review.
Profile Image for K Webz.
1,853 reviews
December 4, 2025
Isabel created a story full of intrigue, tension and amazing characters. The flirty banter between Jake and Daisy was perfection and slow burn romance fit with the storyline.

I loved the pace and storyline of this story, it had me so invested. With corporate greed, betrayal and twists. Kept me guessing!
999 reviews14 followers
December 4, 2025
This a a good romantic suspense read. Daisy doesn't think she needs help. She is sure she can get the goods and get out safely. Her boss thinks she needs help, so he sends Jake to watch over her. Things start are fine but then she runs into trouble and Jake is there to help. But will they be safe and can she protect her heart from Jake?
Profile Image for Julie's Reads.
232 reviews1 follower
December 5, 2025
Ms. Jolie did it again. The entire book kept me on the edge of my seat. Fascinating characters, great plot line, and some steamy romance makes this a fantastic read. It is technically a standalone story, but the supporting characters will have more depth if you start at the beginning.

I received an advance review copy for free, and I am leaving this review voluntarily.
40 reviews
December 3, 2025
Lighthearted with all the suspense you expect from Ms. Jolie. A breath of fresh air with a beautiful love story. Unexpected twists and turns with an original concept. Definitely recommend picking this little devil up right away.
Profile Image for Sammye.
4,314 reviews28 followers
December 6, 2025
This is book two in the Sinful State series. It’s a thrilling romantic suspense. In this intriguing story Jake and Daisy go undercover to uncover the circumstances of her uncle’s suspicious death. It’s a great friends to lovers romance full of drama. I enjoyed it.
846 reviews
December 4, 2025
Second book in the series and not disappointed one bit. The suspense and intrigue grabbed me right from the start. Follow Jake & Daisy and see where it leads. Enjoy
Displaying 1 - 27 of 27 reviews

Can't find what you're looking for?

Get help and learn more about the design.