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Colton 911: Chicago #3

Undercover Heat

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When her life is upended
A detective goes undercover to save it…


After tragedy strikes, chef Tatum Colton buries herself in her job. Detective Cruz Medina soon rocks her world once again, claiming criminals are using her restaurant as a front for nefarious activities. Cruz needs Tatum’s help to go undercover as her sous-chef, putting them both in the line of fire. But when things get hot in and out of the kitchen, can Cruz protect Tatum and their growing bond?

204 pages, Kindle Edition

First published February 4, 2021

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About the author

Anna J. Stewart

219 books751 followers
Anna J Stewart is the USA Today bestselling author of more than fifty sweet to spicy romances. She primarily writes for Harlequin's Heartwarming (sweet romance) and Romantic Suspense (spicy romance). In addition to being a Holt Medallion winner (Bride on the Run), she’s finaled in the Daphne duMaurier Award for Excellence, the National Readers’ Choice and had one of her books optioned as a TV movie. No matter the story, Anna’s books are always about family—the ones we’re born to and the ones we create. Anna lives in Northern California where she loves going to the movies, attending fan conventions, and heading to Disneyland, her favorite place on earth. When she’s not writing, she is usually cooking, baking, binge-watching her newest TV addiction, or re-watching her all-time favorite shows, Supernatural and all things Star Trek and Star Wars She also spends a frustrating amount of time wrangling two monstrous cats named Rosie and Sherlock. You can read more about Anna, her books, and her workshops for authors at www.AuthorAnnaStewart.com.

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5 stars
57 (67%)
4 stars
19 (22%)
3 stars
5 (5%)
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2 (2%)
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1 (1%)
Displaying 1 - 24 of 24 reviews
Profile Image for Tina Loves To Read.
3,748 reviews1 follower
November 16, 2025
This is a Romantic Suspense, and this is the third book in the Colton 911: Chicago series. There was a lot of mystery and suspense in this book, but there was also a good amount of romance in this book. I really loved the characters in this book, and I loved Detective Cruz in this book, and I love the police being in this book. There was twists and turns in this book. The ending was a lot of suspense, and I really enjoyed it. Great read.
Profile Image for Susan.
4,854 reviews131 followers
March 27, 2021
Fantastic book that grabbed me from the start and kept me hooked to the last page. Tatum Colton, chef and owner of Chicago's trendy restaurant, True, lives and breathes her job. Ever since the murders of her father and uncle, True is where she can forget for a little while each day. That relief takes a hit the day Detective Cruz Medina shows up to tell her that he believes her restaurant is being used for drug running. Cruz is determined to stop the cartel responsible for putting his partner into a coma. Convinced that the restaurant is at its center, he wants to go undercover as one of her employees to investigate.

The sparks flew between Tatum and Cruz from the moment they met. She is adamant that her people are innocent, and he is just as sure that someone is not. Though her first instinct was to tell him no, eventually, she knew she had to do the right thing. I laughed at her "training session" with him and her surprise at how easily they worked together. It didn't take long for them to acknowledge the attraction they felt and realize that doing anything with it would be a bad idea. I loved watching their interactions both in and out of the kitchen. As the investigation heats up, so does Cruz's protectiveness, which creates a few awkward situations. There's a great scene with Tatum's mother and aunt and others that involved her staff. But as the investigation hurtles toward its conclusion, Cruz's duty clashes with his feelings for Tatum. I ached for them both as Tatum's worst nightmare came to pass and drove a wedge between them. It takes an unexpected twist that puts Tatum in life-threatening danger to bring them back together. I loved the ending.

The suspense of the story was terrific. Cruz won't let anything get in the way of bringing down the drug cartel, and that includes his growing feelings for Tatum. I loved watching him make a place for himself in the restaurant. There are plenty of possible suspects, and Cruz trusts his instincts in the investigation. The intensity ramps up when Tatum becomes the victim of several attacks, and she becomes as determined as he is to get at the truth. I had my suspicions about who it was and followed eagerly along as Cruz pursued his leads. I was glued to the pages as it all came together, and Cruz got his man. Unfortunately, Tatum was in the wrong place at the wrong time as an unexpected twist put her in extreme danger. I loved seeing her take control of her fear and do the unexpected to save the day.

I thoroughly enjoyed the diverse secondary characters. Tatum's staff at the restaurant were fantastic. I loved the sense of family they exuded and how they watched out for her. Sam and Ty were my favorites. Tatum's mom and aunt were great. Their continuing grief was evident, as was their love for their family. I also liked Cruz's family and had to laugh at how he helped his younger sister.

Though the murders of Tatum's dad and uncle were mentioned a couple of times, there was little mention of its investigation.
Profile Image for Lynn Brooks.
3,616 reviews45 followers
February 22, 2021
An exhilarating continuation of the Colton 911: Chicago series! With book three, Anna J. Stewart picks up the Colton reins as the search for answers continues in UNDERCOVER HEAT. This story revolves around an undercover op at Tatum's restaurant and has a solid, exciting story of it's own outside of the family mystery. Unfortunately the continuity timeline doesn't hold up in this book and a couple of glaring discrepancies had me distractedly flipping back to book one to prove to myself I wasn't remembering incorrectly. In book one, Cruz is brought into the storyline at a family dinner with Tatum before the murders occur but in this book he isn't even introduced to Tatum until weeks after the deaths. Also in the first book, Cruz is currently partnered with Sean's former partner Harry but in this book he mentions Harry, but is most recently partnered with Johnny. The overall book was a solid storyline, but my enjoyment was definitely skewed following up the inaccurate match ups. Better as a stand alone than as part of the series for this reason.

Tatum is a sympathetic character. She's struggling with the death of her family, yet not letting her restaurant suffer during her distraction. I liked her gumption and her good heart.

Cruz is an attention grabbing character. He's determined to get to the bottom of this case he's working on and is willing to put himself out on whatever limb he has to in order to bring the bad guys down.

I recommend this series to anyone who likes an intense storyline with solid family relationships and friendships being a core back bone of the series.
1,848 reviews37 followers
January 18, 2021
A fantastic book! I would expect nothing less from this author! I haven't read the other books in this series but this story kept me turning the pages very fast to see what would happen! Tatum and Cruz were great characters and obviously had fantastic chemistry from the get go. He's a detective trying to solve a drug case that left his previous partner in a coma. She's the owner of a trendy restaurant who just lost her father & uncle to murder. He tells her to there are drugs being run through her restaurant. She tells his that's absurd! And so it begins! Great story, great characters and lots of action! I loved it!
Profile Image for Gale.
2,006 reviews22 followers
January 20, 2021
I won’t retell the story however I WILL tell you what I love about this book and series. IMHO, no one does romantic suspense better than this author. Ms. Stewart kept me on the edge of my seat thru the entire story. The only time I “chilled” out was when she wrote about the food – I could almost smell and taste the dishes!

Tatum Colton is the owner and chef extraordinaire of True. Cruz Medina is a detective (undercover for this story) with the Chicago Police Department investigating illegal activity in his city. Colton:911 Undercover Heat was written with enough intrigue and suspense to grab you in the first few pages and to not make you stop reading until you’ve read ‘The End’. Add in the sizzling chemistry between Cruz and Tatum and I couldn’t put it down.

I loved the cast of characters in the restaurant. I loved both the Colton and Medina families. And Cruz’s fellow officers were perfect – not stereotypical characters. And I gave my heart to Tatum and Cruz; loved this book!
Profile Image for Jeriann Fisher.
797 reviews
May 14, 2021
Pulse Poundind Action

This tense, undercover hero romance sure tugs at the heartstrings before it's all done! Narcotics detective Cruz comvinces Tatum to let him go undercover in her 5-star restaurant to stop a narcotics ring. Things don't go quite as planned, however. Their mutual attraction causes complications. A Terrific 5-star read.
Profile Image for Reese Ryan.
Author 187 books609 followers
January 7, 2022
Lots of action, intrigue, and fun family dynamics in this story. This is my first Colton book, but now I'm eager to read the rest of the series.
Profile Image for Paula Brandon.
1,293 reviews40 followers
November 20, 2022
Tatum Colton runs the highly successful restaurant True. Still upset by the murder of her father and uncle, Tatum's world is further rocked when Detective Cruz Medina shows up to inform her that he believes her restaurant is a front for drug runners. Haunted by the fact his partner is near death because of these drug runners, Cruz is determined to catch them. He convinces Tatum to let him go undercover as a sous-chef in True, to which she eventually reluctantly agrees. She fears if the drug running is made public, it could cause a scandal that will end the restaurant. Of course, the heat in the kitchen expands into their personal lives!

A four star rating for a Colton book, of all things! Anything is possible, folks. More a 3.5 rounded up because, unfortunately, yet again, the length works against it. The middle has some real pacing issues as Tatum repeatedly rehashes the conversation of how she doesn't want Cruz's investigation to ruin her restaurant's reputation. We get it, Tatum! Cruz gets it! Move on! This flagging of the pace took me out of the story and had me picking up on inconsistencies, such as Cruz saying that he's been a detective for over ten years. He's 29. Unless he was stationed at 21 Jump Street, I'm not sure how that works!

Otherwise, I was impressed by our main characters. They felt like real people. This is the sort of romance I enjoy, where the author shows, not tells, us why the characters are into each other. They actually had interesting conversations where they actually talked about pertinent things in their lives, not just about food or about the other characters in the mini-series. Quite the feat, considering this is set in a restaurant! I believe the murder of Tatum's father and uncle is an overriding arch in the mini-series, as that is not solved here. But it didn't detract from the story. Instead, it further developed Tatum's character, highlighting her love of food when she shares a story about her father with Cruz. Some dialogue exchanges between Tatum and Cruz made me smile with amusement! I liked the hero and heroine and I was interested in their romance.

The suspense part is secondary, of course, but it worked well. There was some decent suspense, although the identity of the person helping to smuggle drugs was obvious. The intrigue running in the background was enough to keep things ticking over while the romance played out. Things end on an exciting, suspenseful climax.

One other letdown is the ending. This felt like it was missing a chapter! We get the black moment where , and they never even discuss it! Tatum is understandably furious with Cruz (and I was too!), but then just randomly forgives him. This black moment was at the crux of what could keep Tatum and Cruz apart, and it didn't make any sense for this to be brushed over without any sort of dialogue between Tatum and Cruz to explore his motivations or her sense of betrayal. The book really needed that, and it's completely missing.

Otherwise, this is exactly the sort of story I'm after in this line. It's part of a mini-series that can easily be read as a standalone, the suspense element is secondary, but keeps things interesting, and the heroine and hero really come to life as real people, had interesting things to say to each other, and kept me invested in their relationship.
Profile Image for Teri-K.
2,570 reviews60 followers
April 8, 2021
Though I'd call this a romantic mystery, not romantic suspense, it's a very good, entertaining book that I happily read in one day. When I grab a story like this I'm looking for several things - likable main characters who are believably attracted to each other, interesting details about the setting, plenty of plot that moves well, and a genuine mystery I can care about and puzzle over as I read. I got all of that here.

Our heroine runs a rising restaurant in Chicago and is consumed by her career. The author loves cooking so the details felt pretty accurate. There were lots of scenes set at the restaurant and the people who work there were well-drawn. I especially enjoyed reading about all the work in the kitchen - it made the story feel well grounded. The hero is a police officer whose partner is in a coma from a job-related shooting, and the investigation leads to her restaurant. I worried about the fallout of the investigation on the employees and the business, as well as how it effected the MCs relationship. There was plenty of action to keep the story moving, and I was happy to find that the identity of the bad guy wasn't as clear as I'd expected.

I do have 2 problems with the story.

Still, those two points were minor in terms of the book as a whole, so I can only knock off about half a point, for 4.5 stars for what's really a very good book. I look forward to reading more by this author.

NB - This is #3 in a series, but I haven't read any of the earlier books and it didn't matter. Apparently they are about the heroine's sisters, and don't involve the investigation or anything else in this book. So feel free to jump in here!

Also, I can't but laugh at myself and admit that I once said I'd never read a book with "Colton" in the title. It's just such an over-used last name in romance. I mean it's everywhere - to the point that I think it's ridiculous. Fortunately for me, the title on the spine of the book was simply "Undercover Heat" and I didn't realize till later that it included "Colton 911". So I didn't miss out on finding this author because of a silly prejudice on my part. LOL
Profile Image for MK.
1,700 reviews23 followers
January 13, 2021
The one thing you can always count on in Ms. Stewarts romantic suspense books are fast paced, and romance between the two characters..But this one brings much more. It sure heats the pages up a lot. Plus will have you flipping the pages. I loved it. Now this book is the #3 in a series, and I have not read the rest. I do plan on checking the others out..

Now Chief Tatum Colton runs the True Restaurant it’s her baby so to speak. When Detective Cruz Medina walks into one night to tell her some news that she can’t even comprehend. Soon she’s hired him to work in her restaurant to find out what’s going on. Her employees are her family. She just can’t believe any of them would do anything to her. But things start to happen she can’t ignore.

Cruz wants justice for what happened to his partner. It’s all that matters to him. But he soon starts falling for Tatum Colton. Even the staff at True think there’s something going on between them.
Can he keep the two things separate? What happens when he finds the people responsible. It would break his heart and Tatum would hate him, but he has to do what he has to do. His Job.

Buy the book...so much more to come..
It’s release date is March 1st 2021.
3,668 reviews41 followers
February 9, 2021
I am new to this series, but knowing the story was written by this talented author, I knew I had to give it a try. Glad I did.
Chef Tatum Colton has a trendy and success restaurant. One that is her happy place , especially after the murder of her father and uncle.
Detective Cruz Medina is determined to close down the cartel that is apparently moving drugs in and the restaurant. Especially, after the bullets that practically ended the life of his young partner.
What he never expected was to meet the very attractive and captivating chef. But the job has to be done and he’s the man to do it. Working undercover as the restaurant’s sous chef not only brings him closer to her employees, but also to Tatum.
What happens when the danger escalates and the resolution seems close? What happens when duty, a promise and love puts him at a crossroad?
This was an engaging story from the start to the finish. Though a stand alone , I was left wanting to know the story behind Tatum’s sister January.
I was entrusted a copy of this book. The opinions expressed are solely my own.
169 reviews6 followers
August 29, 2020
Anna J. Stewart knows how to grab your attention when writing her suspense stories. In Colton 911: Undercover Heat, Tatum Colton is living her dream of owning her own restaurant, True. Everything seems to be running smoothly until Cruz Medina, Detective with the Chicago Police Department, tells her that he thinks her restaurant is a front for distributing drugs. Though she thinks he's wrong, she agrees to let him go undercover as a sous-chef at True. As he set about building his case, he realizes that there is attraction between Tatum and himself. Will he solve the case? Will they act on the attraction or let it die? No spoilers here, pickup this book to find out how it turns out.

This one kept me turning the pages and and it hard to put down.

I received an advance copy for an honest review.
Profile Image for Candy Laine.
Author 7 books8 followers
January 20, 2021
Every time I feel she's done her best book yet, she goes and raises the bar again. I absolutely love the book. Cruz comes across as a lean, mean machine with a heart of gold. Tatum is probably all heart and her beautiful soul inspires so much loyalty in her staff. Two of them together, fighting their attraction to each other? Combustion guaranteed!
Profile Image for Rachael.
1,186 reviews4 followers
March 1, 2021
Colton 911: Undercover Heat is another 5-star read by Anna J. Stewart. The storyline was interesting & the suspense kept me hooked. Cruz was the best! I absolutely loved seeing him with Tatum. My favorite scene was when Tatum's mom and aunt met Cruz for the first time. So funny!
286 reviews2 followers
May 25, 2023
This is a romantic suspense and is a quick read. When chef Tatum Colton’s life is upended, detective Cruz Medina goes undercover in her restaurant to stop criminals using her restaurant as a distribution drug center. There are lots of twists and turns which makes this book rather believable
Profile Image for Brenda.
278 reviews
January 18, 2021
This is a great read. I had the culprit figured out in the very beginning but Anna J Stewart put in a curve ball. It was exciting, riveting and thrilling.
252 reviews11 followers
January 26, 2021
I love how Anna J Stewarts books take me away. Cooking, suspense and sex. Fast passed, great characters and a great story. Highly recommend
4 reviews
March 27, 2021
Good read.


I felt it flowed well.
The characters were maintained throughout and inviting. I can't wait for the next book to read.
Profile Image for Ashleigh Carter.
979 reviews10 followers
November 4, 2023
It’s a Harlequin, you can’t expect too much. The usual suspense, hero comes in the nick of time, they fall in love kind of story. Unfortunately, I guessed who the bad guy was very early on in the story although it wasn’t made obvious. I didn’t catch the other twist but it wasn’t too surprising either. A decent Harlequin read with a little spice.
Profile Image for Stacy.
158 reviews1 follower
March 2, 2021
Anna J. Stewart knocked it out of the park once again. Cruz and Tatum have so much chemistry. This was the first time I figured out "who done it", ok part of it. I could not put this book down. I can't wait for the next installment of Colton 911: Chicago.
Profile Image for Cheryl.
1,937 reviews18 followers
February 28, 2021
Another edge-of-your-seat romantic suspense read by Anna J Stewart had me up past my bedtime because I could not put it down!
Detective Cruz Medina needs the help of Chef Tatum Colton since he thinks her restaurant is being used as a cover for drug trafficking. To say she’s annoyed is putting it mildly, especially since her family is dealing with multiple tragedies at the moment. We instantly see sparks fly between the two right away, but their romance burn slowly. Not so with the suspense part of the story, though, because there’s no lack of suspects from the start.
Great cast of secondary characters, as well. Tatum’s sister, Simone, is talked about, leading me to wonder about her and the possibility of her own story. January, their other sister, has her own story in one of the previous Colton 911 book.
Undercover Heat itself is a stand-alone read and another example of the excellence of Ms. Stewart’s writing. 5 stars!
Displaying 1 - 24 of 24 reviews