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Secret Billionaires: Billionaire Romance where Enemies Become Lovers

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Two complete series of Secret Billionaires who yearn for the most unattainable women in their lives, either their best friend or, even worse, their direst enemy. Six entire books of swoony love and comically frustrated men.

Binge-read the office romance where a top Hollywood entertainment lawyer with a cocky closer attitude pines for his curvy, smart aleck paralegal, the sassy Southern peach who’s become his best friend, but she’s married. He fell first and harder, every moment in the office and first-class business trip a torment.

But she’s only pretending to be married because his reputation as the office heartbreaker is beyond what she will deal with.

Think Suits with a slow-burn, royal twist.

And then dive into a thrilling romantic suspense tale about a hot English nobleman with an MI6 secret!

He's six-feet, four-inches of hot, ripped, loaded English billionaire nobleman who appears to be wasting his life and his earldom so audaciously that his younger brother is suing him.

The lawyer defending him from his brother’s greedy clutches is a hotheaded upstart with curves and sass and an American accent, and to keep him from destroying himself, she moves into his London penthouse and poses as his girlfriend at elegant fundraisers and high-society parties.

But his rakish ways are his cover as an MI6 spy, and his undeniable attraction for the young lawyer is becoming unbearable as she stalks off to the guest room every night, when he desperately wants to drag her into his bed.

If you

♥ Billionaire Romance

♥ Danger and Romantic Suspense

♥ Friends to Lovers

♥ Secret Royals

♥ Enemies to Lovers

♥ Secret MI6 Spies

♥ Little dogs causing a ruckus

You’ll love Blair Babylon’s Thrillers that Bang!

1409 pages, Kindle Edition

Published May 18, 2024

1019 people are currently reading
46 people want to read

About the author

Blair Babylon

120 books2,240 followers
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Blair Babylon is the nom de plume of an award-winning, USA Today-bestselling author who used to publish literary fiction. Because professional reviews of her other fiction usually included the caveat that there was too much deviant sex and too much interesting plot, she decided to abandon all literary pretensions, let her freak flag fly, and write hot, sexy, erotic romance.

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5 stars
196 (62%)
4 stars
80 (25%)
3 stars
31 (9%)
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4 (1%)
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Displaying 1 - 24 of 24 reviews
Profile Image for Linda Dossett.
1,004 reviews8 followers
May 23, 2024
This is all the Arthur and Casmir books rolled into one excellent price. If you have not read them or just need one of the set to finish, along with the epilogues, this is the way to go. These are hot, steamy, action filled, excellent reads, can not go wrong here. Some of my favorite Blair books. Grab this set, you will not be disappointed.
Profile Image for Amber.
1,275 reviews33 followers
May 22, 2024


Working Stiff is such a wonderfully intriguing and beautifully touching story of two people who long to be loved and seen for who they truly are. The tremendous emotion that flows through these pages is delightfully offset by the warm humor that finds its way into the most intense situations at times. While I have loved each of Blair Babylon’s books, this one had a very different yet vibrant feel to it. It was rich, decadent, and yet still very much down to earth and true to the author’s heart. I honestly couldn’t get enough of the amazing characters found throughout this journey. They all played a necessary role that transformed this story into so much more and literally made it come alive.

Hard Work is such a wonderfully intriguing and beautifully touching story of two people who long to be loved and seen for who they truly are. The tremendous emotion that flows through these pages is delightfully offset by the warm humor that finds its way into the most intense situations at times. While I have loved each of Blair Babylon’s books, this one had a very different yet vibrant feel to it. It was rich, decadent, and yet still very much down to earth and true to the author’s heart. I honestly couldn’t get enough of the amazing characters found throughout this journey. They all played a necessary role that transformed this story into so much more and literally made it come alive.

What a way to lose your heart so utterly and completely to a story! Stiff Drink is such a brilliant story that will touch you on literally every level imaginable. It will penetrate your heart and run numerous stealth missions to win over every piece of it. When you finally walk away from this book, you will see with new eyes, feel with a greater depth, and hope more intensely then you ever imagined. This book highlights and savors the most fragile and precious parts of what makes life truly sweet and fulfilling.

When you find your heart completely lost to a tumultuously stunning plot whose characters intertwine and ignite a firestorm that razes and implodes your very world, you KNOW you have found an epically talented author who owns every ounce of your reading devotion to the end of time. Hard Liquor is utter perfection with its sizzling mystery, undeniable passion, and mind-blowing twists that catapult it into the realm of fantastically, true bliss. This is romantic suspense at its absolute finest! If you are looking for a refined yet genre-blasting story that will feed your intelligence along with your heart, then you have found the object of your obsession. Blair Babylon will feed your passion and set your imagination alight with her limitless possibilities and awe-inspiring imagination.

Blair Babylon is a testament to the extraordinary beauty, grace, and talent that is quickly fading around us. More than anything, we long to experience the pure and living creation that is well written and heart imbued hope in the form of words breathed into the universe that will eventually find its way in our very soul. Readers can breathe a sigh of contentment and relief to ingest and savor the incredibly soul nourishing and heart transforming words from this spectacular author. I have yet to read anything from her that doesn’t touch me deeply and sincerely every time I pick up one of her breathtaking masterpieces.
Profile Image for Suzana.
691 reviews26 followers
June 12, 2024
♥ Contemporary
♥ Thriller
♥ Billionaire Romance
♥ Danger and Romantic Suspense
♥ Friends to Lovers
♥ Secret Royals
♥ Enemies to Lovers
♥ Secret MI6 Spies
♥ Little dogs causing a ruckus
♥ Emotional roller-coaster
♥ Unpredictable twists and turns
♥ Gripping
♥ Page turner / quick - fast-paced read
♥ Fun cast of supporting – secondary characters that add to the story and development

Two series of Secret Billionaires feature men who desire unattainable women, either their best friend or their enemy, in six books filled with love and frustration. The first series follows a Hollywood lawyer who longs for his paralegal best friend, who is pretending to be married to avoid his reputation as a heartbreaker. The second series is a romantic suspense tale about an English nobleman who is an MI6 spy, and his lawyer, who poses as his girlfriend to help him as they struggle with attraction while navigating high-society events together.

This boxset combines all Casmir and Arthur books into one, offering a hot, steamy, action-filled read, funny and heartbreaking moments, creating a deep and engaging reading experience; well-written characters (billionaire, nobleman/MI6 spy, strong-willed women) who evoke a strong sense of hope and emotion.

These stories throw light on how individuals, Casimir and Wulf who turned out very differently, are shaped by their upbringing and inherent character. Through both series the author expresses beautiful storytelling skills with emotional depth, humor, and vibrant well-developed characters, captivating plots filled with romance, mystery, intrigue and a good dose of humor, romantic suspense elements, especially portraying characters' relationships and pasts.

Cas and Rox's story is beautifully written and action-packed, featuring funny, strong, and lovable characters. Rox grapples with real relationship concerns, while Cash carries a heartbreaking past. Rox, who was hired by Cash, known for his one-and-done reputation, pretended to be married to avoid getting involved with him. Three years later, they have developed a great work relationship and are now close friends. When Rox assists Cash in a difficult situation, their attraction deepens. Rox is torn between confessing her lie and risking their relationship or keeping it hidden. The book is infused with humor, candid interactions, and a slow-burn friends-to-lovers romance. The palpable chemistry between Rox and Cash, along with drama, suspense, and heartfelt moments, keeps readers engaged with unexpected twists and surprises.

Arthur's story, introduced in Working Stiff, unveils a mysterious character who is not as he appears. Gen, a barrister with confidence issues, shares a strong chemistry with Arthur, despite their polar opposite personalities. Their interactions will evoke laughter and tears, fueled by delicious sexual tension. Gen, a determined lawyer who faces daily challenges to prove herself, inherits Arthur's case and must navigate his cocky demeanor to save his earldom and her career. Arthur, a playboy, becomes intrigued by Gen, leading to a complex and engaging dynamic between them. The palpable chemistry between them drives the well-written, witty, romantic, and intriguing story that leaves readers yearning for more. The smooth and intense progression of the story, along with engaging character interactions and steamy scenes, will captivate readers from start to finish.
Profile Image for T.M. Payne.
Author 37 books93 followers
May 19, 2024
Book: Secret Billionaires: A Prince and an MI-6 Spy 6 Book Boxed Set
by: Blair Babylon
My Rating: 5 Stars
Reviewed by: Tammy - Book Nook Nuts

REVIEW

I have read and reviewed the following books previously and I am going to put a few of them here on this wicked good boxset offering. Each of these stories gives you an Alpha Male Billionaire and a strong-willed woman who will tame them.

Working Stiff:
I have read quite a few books by this author and I am going to say I think this one is my favorite so far. One thing I love is we hear of others from previous series, which I always love when an author does that.

In this story, we have Casimir aka Cash. Cash lives in California and he is a lawyer in a firm that deals with high players. Rox is his personal assistant and unlike all the other women who work there, she has no pull on Cash or at least she does not realize she does. Cas has always had feelings for Rox but she has a wedding band on so has been off limits. After some major thing happens, Rox ends up staying with Cas and well many things take place for these two. Of which includes a trip to Cas' real home and a visit with his family. Rox learns many things that no one else knows about. What will happen to this couple? Well grab a copy and get reading it is good.
The story, the plot, the couple and others make this book worth reading.

Hard Work:
This book continues with more Cash and Rox.
Mystery, tons of emotion, and laughter that is what you get.
Trouble seems to follow Casimir & Rox can they finally avoid it long enough to get tangled up together?
I would highly suggest you grab Working Stiff first so you continue the story of this very likable couple.

Stiff Drink:

I have really enjoyed every book I have read by this author.
But I do believe this is the best yet.
Genevieve is a lawyer but she is now given the task of let's just say man-sitter. After an unfortunate event she is now tasked with Arthur who is very rich, a playboy, a troublemaker perhaps?

How is this young lawyer going to shape up this sexy, alpha, pain in the rear?
Will Arthur get his way with this beautiful young lawyer?
I enjoyed this couple, nothing was fast and it flowed smoothly. I do believe I have found another fantastic series.
Well grab your copy and find out.

**I am voluntarily leaving my honest review of this book**
Profile Image for Lisa.
1,255 reviews3 followers
May 20, 2024
I have previously read all of these books before they could be conveniently found in one place and they were a great read!

With the first billionaire - Cas and Rox's story was a great story that is beautifully written that I thoroughly enjoyed it from start to finish. I enjoyed the characters as they seemed real despite the secrets that they held. It was action packed with a plot that moved along with a few surprises. The characters were funny, strong, believable as well as loveable throughout the story. Rox had real relationship concerns when it came to Cash and Cash had a heartbreaking past that was not the sole focus of the story. I rooted for them to be together from the beginning and was hooked from the first chapter.

With the other billionaire we get Arthur's story who was introduced in Working Stiff and was an intriguing character that had a lot of mystery once we got to know him and does not seem like what he wants the world to perceive him as - the Earl of Gives No Fucks. Gen was a pretty straight forward character that has some issues from her past,as well as a confidence issue as she works to become a barrister. The pair are polar opposites but have amazing chemistry together, are well developed and written well.

Both stories were well written and had some twists that left me wanting more when the books ended. I have been a longtime fan of Ms Babylon's and if you can get past the sheer size of this boxed set the you will not be disappointed.
Profile Image for ButtonsMom2003.
3,772 reviews41 followers
May 22, 2024
I read and reviewed these books when they were first published individually. Below are a few comments I made in my reviews back then.

Blair Babylon has penned a captivating story filled with romance, mystery, intrigue and no small amount of humor.

P.S. Don’t let anyone tell you romance novels are a bunch of crap written at grade school reading levels. Here are a few of the words I had to look up as I read this book:
teester
aesthete
musth

Once I started reading these books I couldn't put them down. I fell in love with Gen's character. She's trying so hard to be British and give up the Americanisms that hamper her climb up the career ladder. Arthur is helping her with that project and they come to work very well together.

This story made me laugh out loud in several places and shed tears in others. This kind of reaction from me is exactly what I look for in a good book and Blair always delivers just what I need. I nearly forgot to mention that the sexual tension between Arthur and Gen is absolutely delicious!

Blair Babylon has once again managed to craft a story that has very funny moments, heart-breaking sad moments and an HEA that I was sure couldn't happen (except that I know Blair always manages to give us one – eventually).

In conclusion, if you like billionaire stories with scorching hot scenes and sexy guys and gals you can't go wrong with the boxed set.
Profile Image for Lili.
837 reviews48 followers
May 25, 2024
Casimir & Rox

They say that each person is shaped into becoming what they are by their birth circumstances and their upbringing, and I agree to a certain extent. Reading this book proves, though, that a determining factor is the character you are born with, the goodness which shapes your soul.
Casimir is raised by the same parents as Wulf, but they are each unequivocally different from each other. Despite the indelible cuts his childhood trauma left on his psyche and his deep trust issues, Cash did not become bitter and vengeful with the world and everybody in it, whereas Wulf is an hypocrite out to step on cadavers just to fulfill his ambitions, like so many others before him.

I think I would not have noticed this aspect of the book if it was not so obvious that the parents are nowhere to be seen, they just exist in the background and are mentioned in passing except for Rox's mother, who really is no more but has left such a strong legacy of fear of abandonment in her heart.

What I find so interesting in Blairs' books is that, beneath the well-written love story in each of her books and her talent for conveying the feelings of the characters, there is an underlying approach to a life-shaping topic, which makes me want to read every book she writes.
2,157 reviews14 followers
June 10, 2024
Secret billionaires? Ooooh. Yes please! A 6 book box set of secret billionaires? Gimme gimme gimme!

Working Stiff: Office Romance with a Royal Secret (Secret Billionaires Book 1) by Blair Babylon

Southern belle Rox would never sleep with her work husband, the gorgeous Cash. She doesn’t want to have her heart broken like all the other single women in the office. Which is why Rox pretends to be married. Cash never had a chance with the beautiful Rox. She had been married before he met her. But what happens when Rox admits to Cash that she's not married? Working Stiff is a billionaire romance full of drama, angst, pining, intrigue, action, suspense, twists, banter, laughs and steam with all the feels and never a dull moment!

Hard Work: Office Romance with a Royal Twist (Secret Billionaires Book 2) by Blair Babylon

Rox and Cash are finally together after 3 long years and are basking in their newfound happiness ... but there dark forces at work that could smash their happiness to smithereens in one blow. Rox and Cash are blissfully unaware of this. Will it be too late when they find out? Hard Work is a billionaire romance full of drama, angst, pining, intrigue, action, suspense, twists, banter, laughs and steam with all the feels that kept the pages turning!
320 reviews1 follower
May 30, 2024
Two of Blair's greatest books in one place; it doesn't get much better than this!
Working Stiff: Casimir tells the story of Cash, a sexy, good looking attorney who will sleep with any female who walks through the door; and, Rox, the only paralegal that can stand working with Cash, and not surprisingly, the only one who hasn't slept with him. But what happens when they are thrown together, their lives depend on each other, and everything they knew about each other turns out to have been wrong; the sparks fly!
Casimir will make you laugh. cry. cringe with fear, and hope for the Cinderella ending. You will also be introduced to new friends in Casimir, while visiting old ones at The Devilhouse. And, don't be surprised when Xan Valentine's name pops ups a few times.
Stiff Drink: I absolutely cannot get enough of the drunken royal who is being sued by his brother for partying the family fortune away; but, is that what he is really doing???
And poor Genivieve, an American trying to become an English Barrister; only to be given the one case that no one else wants, keeping Arthur out of trouble. But these two seem to create their own kind of trouble.
67 reviews
November 5, 2024
Mixed thoughts

Overall after reading and enjoying 90% of all 5 books, I have some reservations about the entire 5 book volume.
I’m not sure what I think about this one volume set. These books are each standalone books which is almost entirely true. A couple of them have one story that ends with a question and the next story begins with the answer. Felt like I was tricked. Not too big of a deal. But I felt like I was tricked.
The only other thing that I wish to comment on is the highly detailed description of the many sex scenes in all of the books. I’m certainly no prude. I do think that the many sex scenes are highly, unnecessarily written in typical hardcore style. Frankly they get boring. The characters speak (and think) in crude, dirty language. A little of that language is fun to me but Blair way overdoes it to the point of my own discomfort.
I did enjoy the books, the overwrought sex scenes excluded. The characters were fun. I laughed out loud many times. The story was cuter than most of the other adult rom-com books I have read. With some editing I would have given the volume 4-stars instead of 3-stars.

54 reviews2 followers
June 12, 2024
This is a good collection.
Casimir and Rox's story is a 4.5 star read for me. I really enjoyed their relationship and how well they worked together. There is romance, intrigue, suspense, action, and banter. They feed off each other's energy in a positive way that really makes the story come alive. Cash is a total playboy, and Rox has some doubts about his relationship abilities, but he takes care of her and puts her first. He is definitely book boyfriend material.
Arthur and Gen's story is 4 stars for me. It kept me guessing, because I couldn't figure out how Gen and Arthur were going to get out of their predicament. The ending was good, but I felt like Gen betrayed his trust after asking him to trust her. This downgraded the story for me. There is power exchange with a lot of "Pet" and "Good Girl" as well. I didn't like it as much as Cash's story, but it is still good.
1,293 reviews3 followers
June 12, 2024
Casimir van Amsberg is an entertainment lawyer in LA. He is also other things but doesn't discuss it. When he meets the new paralegal, Roxanne, she doesn't want to be just another notch in his bedpost.
This is a good story with some good twists and turns that keep you reading to the end. Next up is one of his best friend's stories. Arthur Finch is the ultimate British playboy. His lavish ways are catching up with him. Then there is Gen, the newest barrister in her law firm and is assigned his case. She is all curves and just what he likes but will he? There is lots of twists in this one along with sibling infighting that keep you reading to the end. This is a good one.
Profile Image for Chris Tonn.
38 reviews
May 19, 2024
I have previously read all of these books separately. In fact, I must admit that I've have read every single one of Blair's books and can hardly wait until she publishes her next book. Her books always have great story lines, are well written, have strong heroines and interconnect with each other although each story line is separate. You feel like you know these people. This boxset of books are about Casmir and Arthur who attended boarding school together. I know I really enjoyed their stories and I think you will too.
Profile Image for Carol 27.
1,093 reviews
May 21, 2024
This super bundle of two complete series has it all, along with several of my favorite tropes too! Casmir and Arthur, are swoon-worthy, secretive and Dominant. Roxanne and Genevieve are smart, feisty and determined to stay one step ahead of these charismatic men. So. Much. Fun!

I loved the interactions and the dynamic between each couple! The stories are well written, with humour, drama, suspense, and a little mystery along with several steamy encounters, featuring some elements of BDSM.
Profile Image for Carolyn Spence.
1,912 reviews16 followers
Read
January 2, 2025
This is an awesome series and I loved every minute of it. It's well written, and the plot is very detailed and the characters are exceptional. Arthur and Gen are wonderful together, their banter is off the charts, and the "British ways" are funny. A bundled set of all the connecting books is the way to go for these two characters.

It's also contains Cas and his romantic adventures in California.
Profile Image for Michelle Fortune.
1,708 reviews5 followers
May 25, 2024
Cas & Arthur normally break hearts until they almost get theirs broken by these two who will not break down. Playboys cannot be playboys if the women will not play. The intrigue between all of these books brings you around the world and will keep you guessing and on the edge of your seat throughout. I could not put this down and pent many a sleepless one reading.
Profile Image for Ruth E.
105 reviews
June 30, 2024
Lords and Ladies

British Royalty never seems to disappoint when it comes to amusing, or horrifying, we Americans. Such is true in this book.
A lawsuit fighting for an Earldom, a fiesta Texan/British "bull dog" barrister, extravagant parties, a Royal wedding....and spies, a British/Californian barrister, and a priest wannabe (?) playboy....
Oh, myyy
231 reviews5 followers
August 13, 2025
billionaire royalty

Three young men have been sent to a boarding school in Switzerland ant the young ages of six and seven. The boys are of royal or noted blood. Now at the age of almost thirty they are best friends still and each doing well in life. As each man reaches a devastating part of life they all come together just as families do. Great read.
1,280 reviews3 followers
May 19, 2024
What a great way to read these 6 books - this price is a bargain!! Each of these stories is a mix of steamy romance with suspense, action and mystery, blended with emotions and humor. I have yet to read a book by Blair Babylon that I did not devour. And these are books I'll read more than once.
Profile Image for Christy Warthen.
848 reviews9 followers
May 22, 2024
Amazing!

Cas and Rox & Aurthur and Gen are two of my most favorite couples by Ms. Bablyon! Their stories are unique, captivating and entertaining. It is fantastic to have them all together.
Profile Image for Sammye.
4,391 reviews30 followers
May 25, 2024
This is an amazing boxset at an excellent price. The books are full of danger, suspense, twists, mystery, romance and steam. I highly recommend Cash and Rox’s love story.
27 reviews
July 29, 2024
Great Series

I loved everything about this series. All the characters and all the drama. Great story, characters were dimensional, steamyness—all of it
Profile Image for Helen Maddix.
299 reviews6 followers
July 30, 2025
Wow! Just WOW!
I have read everything that Blair Babylon has written, and love all of the books. But my first read was Arthur and Genevieve's books, which is really the second set of books in the series. Which took me to the first books in the series giving Casimir and Roxanne's story. Putting them altogether into a box set is brilliant! If you enjoy alpha males, that are tall, handsome, and very wealthy you need get this bundle. And prepare to be engrossed in the world that Blair Babylon has created. And be prepared to re-read the series over and over again. You could just read part of the series, but why? All are well written with very well-developed characters, including secondary ones. All are very detailed and make the reader feel that they are really in the story. Get the set now!
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