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White Hat Security #4

Hacker Undercover: A CIA Billionaire Romance

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A woman set on revenge Sophie has spent the last twenty years looking for her sister and the people who killed her parents. She works undercover for a man she loathes because he’s promised her information and assistance in her search. Though she’s determined not to be distracted from her quest for family and revenge, she nonetheless finds herself drawn to Agent White, a CIA agent who may be looking for the same people. No matter how tempting Agent White’s handcuffs are, she will not let a man come between her and her goal. A spy who only works alone Agent White’s boss, the director of the CIA, sends him to arrest Sophie Stewart without giving him any further details. He doesn’t expect to come face to face with the most beautiful and fiery woman he has ever seen. A loner by preference, he’s never wanted more than a one-night stand with any woman. However, something about Sophie calls to his inner soul. With one look at Sophie, Agent White knows he wants something permanent with her. The more Agent White learns about Sophie, the more he is determined to keep her safe and never let her go. But for him to do that, Sophie has to stop hiding her secrets – even if those secrets change the course of their lives. Will Agent White be able to save Sophie before time runs out? **Each book in the White Hat Security series is stand-alone.

246 pages, Paperback

First published April 17, 2018

437 people are currently reading
156 people want to read

About the author

Linzi Baxter

64 books313 followers
Linzi Baxter hails from Bismarck, North Dakota, but currently lives in Orlando, Florida. She received her bachelor’s degree in information technology from the University of Central Florida and is currently in the process of earning her MBA from the same university.

Baxter works as an IT Manager for the local government and spends her free time playing with her basset hound, watching college sports, traveling to Europe’s great cities, and reading romance. It was that last passion that inspired her to write her debut novella, Hacker Exposed.


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5 stars
432 (60%)
4 stars
197 (27%)
3 stars
68 (9%)
2 stars
10 (1%)
1 star
2 (<1%)
Displaying 1 - 30 of 41 reviews
Profile Image for Deanie Nelder.
1,131 reviews21 followers
April 24, 2020
Hacker Sophie has spent most of her life looking for the people who killed her parents and kidnapped her sister. However, when she goes too far helping a friend, she gets caught, and is blackmailed into working for the CIA to stay out of prison. CIA agent Zane (aka "Mr. White") isn't thrilled with his boss's plan, but is willing to do what it takes to get the job done. But in this world of spies, nothing is as it seems, and telling the good guys from the bad guys can be nearly impossible.

In the fourth White Hat Security book, Linzi Blake tells a longer, more in-depth story that's more peripheral to the main White Hat Security story. The book drags in places, but most of it is filled with thrills and secrets. Not to mention the smoking hot romance between Sophie and Zane.
Profile Image for Amber Jones.
374 reviews8 followers
April 7, 2018
This is an amazing story full of action and romance in a spy novel setting.
This is the first book I've read in the series and it's a great stand alone novel. I will definitely be looking to read more from this author and in this series.
Sophia is such an amazing character strong and full of sass but so very vulnerable. After trying to save her mom and jumping in front of a bullet she finds out her sister is gone her parents are dead n she can't ever have kids. She hunts for revenge and for the sister she lost all while trying to stay away from romance because she will get her heart broken when the guy realizes she can't give him kids. She never expects to meet Zane. Oh lordy is he yummy n cocky n full of himself and crazy about her. They are a perfect match. Live love love this book. A must read
5 stars
3,114 reviews26 followers
January 2, 2022
#4 and #5 is really one big story.

If Patty and Jessica's secret wasn't enough we have another one. Sophie's problem began when she was a child. With a sad backtstory. I won't spoil it. She ends up working for then running away from the CIA. The good news is that the CIA agent she's assigned to work with is the brother of the US President.
Profile Image for Marie.
5,056 reviews52 followers
December 10, 2022
'Stop running from us'

But is it running if it keeps everyone safe?
Sophie and Zane's story is a bumpy and heartbreaking one, but one that will endear both of them to you. I don't want to give too much away as Sophie's devastating story is also tied to another....one I cannot wait to read.
I read this on Kindle Unlimited.
Profile Image for Jennifer Pierson.
11.7k reviews189 followers
April 21, 2018
This was my first Linzi Baxter book, and WOW! Was I missing out on an exciting party! Normally, I would give a description, but I've decided with all the twists & turns, that I'm going to give a very brief, if any, one this time, because there are so many, that my f-bombs rained down like a crazy rain storm, and I don't want to accidentally give anything away. I will say that it centers around hacker extraordinaire Sophie, who is desperately looking for her younger sister. And this is how she meets Agent White, aka Zane, when he is sent to arrest her. Which takes them on a crazy mission that is heart pounding with it's intensity. Not to mention the chemistry is crazy hot, so it doesn't take long for that to ignite into sexy times that light the sheets on fire. Then there's a colorful cast of secondaries that add to the intensity with their own set of skills, drama of secrets that intertwine, and at times, a lot of humor to make this story even better. I really LOVED Linzi Baxter's talented, and highly addictive writing style, as she had me hooked from the very beginning. And that ending? Well let's just say that she's been added to the list of author's trying to KILL ME DEAD, and hash tagged forevermore #EVILWHORE, because now I NEED that next book like I need coffee in the morning! HIGHLY HIGHLY HIGHLY RECOMMEND TO ALL!
Profile Image for TXBRITGAL.
1,426 reviews32 followers
June 21, 2018
These books just keep getting better and better and better! Sophie has been under the thumb of a corrupt govt. Official since her parents were killed years ago. Desperate to learn the whereabouts of her baby sister she agrees to work for this monster. All the while getting info to bring him down. So of course her day begins with a hot looking suit bringing her in for treason?! It was the monsters way of yanking her chain....he had no way of knowing it would also be a means to meet the love of her life Zane aka Agent White. All kinds of mayhem happens....excitement, intrigue, deception, secrets galore and a few surprises thrown in along the way. This book NEVER disappoints! Take a peek and get ready for one heckuva adrenaline rush. ENJOY!! Be forewarned....I HIGHLY suggest reading the previous books in this series if you haven't already. That way you will have a far better understanding of all the players here....especially as they all act like a family of highly trained misfits 😀. Get ready and take this adrenaline packed ride.
Profile Image for Anne Baker.
756 reviews4 followers
April 17, 2018
The Special One

I only wish I could give more than 5 stars for this continuing series of Linzi Baxter’s White Hat Security series. Don’t blink for a second with this superb fast paced, intriguing story or you could miss vital parts of the fantastic plot, as there are so many magnificent twist and turns. But oh what a brilliant cliffhanger at the end, not what you are expecting. For 25 years Sophie has been searching for her mom’s killer and the kidnapper who took her sister Kat. Revenge is her life now! Sophie is a very talented hacker and will go to any lengths to find the perpetrators. Zane (Agent White) has been ordered by CIA who he has worked for for 10 years to bring down The Devil! Who works for who? You will have to read this absorbing thriller to find out! Sophie has her own secrets, will they come out? This is a definite one-click you must read! I voluntarily reviewed an ARC for an honest opinion.
97 reviews2 followers
July 1, 2019
It’s ok.

So I only got a few chapters in when I realized how ridiculous the thought process of this story was... in the previous book when they were all trying to figure out who was after Jessica THE ENTIRE BOOK!! Antonio was literally only mentioned a few times and was the owner of a mercenary company with his brother but was a body guard a few times for Jessica. Sophia was the one who was magically coming up with the answers no one else could seem to find and sold herself to the devil in the end Bc she hacked into somewhere she shouldn’t and said they would come after her. No one INCLUDING Antonio knew how she got her info to save Jessica but in this book he all of a sudden is in DEEPER and a higher up rank than the big bad man that has Her under his thumb in the first place? It was all out of wack... also!! You need to have and ATTENTION: this book has bdsm attached to each descriptions your books.
Profile Image for Tori .
435 reviews27 followers
June 28, 2019
Our favourite characters are back one more in this fabulous next instalment

Hilarious banter, whitty one liners, a fabulous storyline that will make you ache for the characters.

Sophie and Zane take us on a new journey, trying to fulfill a mission set my Zane's brother while trying to locate someone from Sophie's past, life has never been more challenging.

Until they realise the person from Sophie's past is also from Antonio's and someone will stop at nothing to keep them away from the truth.


Not to mention the immediate and growing attraction and protectiveness between Zane and Sophie that Sophie is reluctant to embrace.

With the support from White Hat and their extended family they all have to overcome the obstacles and reclaim someone before she is moved our of their grasp again.

Best white hat so far...
2,361 reviews12 followers
April 9, 2018
5 stars
> I received a free copy of Undercover Hacker, White hat Security book 4 by
> Linzi Baxter and this review was given freely.
> Sophie survives when her family is murdered,becomes an excellent hacker
> and becomes involved with CIA agent Zane. A dramatic and violent opening,
> a glimpse of foreshadowing giving us hope for a happy ending,ironic humor
> , some serious steam, and a twisted plot of murder and fake death
> involving Sophie the CIA, the President of the United states, Sophie's
> sister who just happened to be Antonio's wife,and a sting operation. This
> romantic suspense is action packed, full of intrigue and deception, and is
> constantly changing with lots of surprises.
Profile Image for Kirsty Warner.
89 reviews1 follower
October 5, 2021
All is most definitely not what it seems within the fourth installment of the White Hat Security Series. 

Mr White aka Zane.. well hot damn. All that cocksure attitude thrown around a woman who has quite literally spent the last two decades doing what ever she can to find her missing sister... its a beautiful time bomb waiting to blow.

Lies, Betrayal, Sex, Romance and even the president this book has it all within its pages keeping you hooked from the very beginning. 

But when all the long kept secrets are laid down will Zane and Sophie have a future left within their grasp at all? Could it be possible? With so many outside forces trying to finish what they started. You wont expect this twists and turns that are coming. 

Book 4 you have been a pleasure. NOW BOOK
Profile Image for Sharon A..
181 reviews3 followers
July 27, 2020
Uh oh! Yes, a HEA but a cliffhanger too.

Linzi Baxter did her usual spectacular job of taking us down the mountain full for hairpin curves. She kept me on the of my seat, turning pages as fast as I could. Once I started reading, I couldn’t stop! The cliffhanger threw me for a loop and now I’m scrambling to get to the next book in the series

The hero, Zane is eye candy and deadly. The heroine, Sophie is beautiful and smart. He can kill a person with a gun, but she can kill a person with a few clicks of the computer. Put the both of them together, you’ve got an unstoppable pair, with some sexy time thrown in!

5 stars, again!
2,472 reviews32 followers
August 29, 2020
Undercover Hacker

Undercover Hacker is so good.. Zane is the male lead he is sexy, mysterious, an alpha and loves to shoot first ask questions later. Sophie is the female lead she is feisty, a hacker and goes by her own rules. She will fight the chemistry and attraction between her and Zane from beginning to end. The story is fast pace. I highly recommend this story but I would read this series in order. Their are so many secondary characters that trickle in from book one into this story. In my opinion you will follow the storyline by reading the series in order. Happy Reading!!
Profile Image for Andrea Akers.
1,027 reviews6 followers
February 20, 2020
Undercover Hacker

Sophie has been leading a double life for many years and the need to come clean is wearing on her. The problem is she doesn't want to put her friends in the line of fire when she does. In walks Zane to arrest Sophie yet Antonio and Alex want to know what is going on. Once the dust settles, answers to the past will come out but Sophie and Kat are in more danger now than they have ever been. Will Zane and Sophie find their happily ever after before disaster strikes?
Profile Image for Carolyn Spence.
1,887 reviews17 followers
November 24, 2022
Action from page one, intensity from page one, steamy from page one. Non-stop. I loved Zane, he kind of reminded me of another Zane, and that's a big compliment, must be the name! A lot of connections are revealed in this book, that make you think, wow! Loved those kick ass women, and loved the levity of their overall family in general. What an explosive last line! She was enough.

I voluntarily reviewed this book.
1,161 reviews26 followers
April 14, 2018
Just finished reading this book and truly enjoyed it. You really like the characters in this book and hope Sophie ands Zane get things worked out. There is a lot of action and a lot going on in the background. There are a lot of twists and turns which keep you guessing on what is really going on and who the bad guys really are. Want a fun read, then read these books
Profile Image for Cheryl Shearer.
687 reviews18 followers
April 19, 2018
Perfect read

Loved this book - number four in the series, with number five due in July. Zane and Sophie owned this book but all the other characters fed through from the first three books. Great story line - really enjoyable suspense and thriller elements with some lusty and passionate seductions and lots of love thrown in the mix.
Profile Image for Charlotte.
817 reviews
November 5, 2018
Another Must Read!!!

I just can't put this series down until I'm up to date. This is Sophie & Zane's story. In order to experience the series as a whole, I recommend beginning with the first book and moving forward. Very intense in its imagery, powerful, thought provoking..... Must Read!!!
Profile Image for  BookwormMomma7.
942 reviews
February 9, 2019
Absolutely Loved It

The gang is back together and is Sophie’s turn at the wheel, all roads lead to Agent White and the surprise turns will give you whiplash but will keep you reading to the last page. This is by far my favorite book of this series and I can’t wait to read book #5.
Profile Image for Carolyn.
1,798 reviews7 followers
December 15, 2021
Zane and Sophie

An action packed, suspenseful and hot steamy read. This book features Sophie, a hacker for White Hat and others it seems, and Zane, a hunky CIA operative with an important sibling. Lots of secrets revealed in this one. We have alpha males and their not so submissive women which leads to fun and troubles.
336 reviews1 follower
December 21, 2022
quick and excited book!

This book was quick paced, from one thing to another which I loved! It felt like I didn’t take a breathe before I finished this book, I was entranced. So many secrets came out which had be gasping the entire time. Absolutely loved that Sophie and Zane had their happy ending!!
222 reviews
April 13, 2018
what a great book it grabbed me and kept me wanting to see what was going to happen next it does end on a cliffhanger of sorts i can t wait to read the next book in the series i only wish i didn t have to wait so long i received an arc of this book in exchange for my review
Profile Image for Krisha.
385 reviews5 followers
July 10, 2021
Amazing Story Linzi!

Ok out with it Zane and Sophie explode together !
Linzi brings everything you in book together .
Alpha males. , stubborn feisty women, suspense and twist you don't expect. Grab yourself a copy .
This hacker series is off the charts.
78 reviews2 followers
January 4, 2022
Great read

Great book highly recommended. It's a book I can not put down its had me gripped all the way through. I'm off to read the next book.

I would recommend you read them in order so no spoilers
262 reviews
March 9, 2022
Good read

This book grabs you right from the very 1st page and keep you interested until the very end. Great characters and story line. A stand-alone book. Looking forward to more from this author.
679 reviews3 followers
August 27, 2023
Hacker Undercover

Excellent book! Take your favorite spy movies and characters, blend them all together and add some steamy sex.
That is this book and series! I won't spill any secrets but the story line is full of surprises.
Profile Image for Paige Smith.
682 reviews7 followers
April 17, 2018
This series just keeps getting better! Undercover Hacker is another book by Linzi Baxter that will keep you on your toes.

I voluntarily received an ARC for an honest review.
Profile Image for Spunky N Sassy.
5,388 reviews118 followers
April 18, 2018
Spunky N Sassy Rating: 4.0

~~~~~~~~~~Lindsey's ⭐⭐⭐⭐ Review~~~~~~~~~~

This book was full of mystery and lots of surprises. Other readers are going to love it too.
Profile Image for Mandy.
816 reviews5 followers
May 1, 2018
"I received an exclusive ARC copy of this book"
I love books with a female hacker role. Such a good book a lot going on. Some amazing characters in this book. Can't wait to read more.
Profile Image for CHANDRA  FIELDS.
369 reviews1 follower
May 29, 2018
Chandra's Review

This was the fourth book in this series! I love it! It was full of love, romance, mystery, and intrigue! I would definitely recommend this book to read!
Displaying 1 - 30 of 41 reviews

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