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Most of us have a code we live by.
Some live their life altruistically, while others live by a more sinister code.
A code that only their victims know. A code to kill…

Fresh from a grueling joint operation with Spenser Song, FBI agent Blake Wilder continues to find herself being stalked and hunted down by an unknown culprit. The worst part is that they may be after her loved ones as well.

Still unable to identify her stalker, Blake meets up with Kit at a coffee shop.
There Kit gives Blake crucial intel about an arms dealer, with advanced weaponry.
A dealer that’s on a bloodthirsty path, a path that claimed the life of someone close to Kit. As Blake and her team investigate the case, they uncover a web of aliases, and a cryptic code name with a string of deaths connecting to it.

Dirty bombs, advanced weaponry, and a trail of silent victims.
Who is this elusive arms dealer? As Blake races against time to unmask the truth.
The only thing that is certain is this weapons dealer is on a path of bloodshed.
And killing is not just a choice, it’s the only code they live by…

246 pages, Kindle Edition

First published December 1, 2023

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About the author

Elle Gray

144 books720 followers
Elle Gray lives in a small town with her 2 cats, and her handsome husky.
As a girl, she was obsessed with crime novels and thrillers.

Today, she loves writing and creating thrilling novels with courageous, strong heroes/heroines and dangerous psychopaths. She invites you to join her exciting world of detectives and FBI agents that take down killers and kick butt.

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5 stars
3,395 (69%)
4 stars
1,208 (24%)
3 stars
233 (4%)
2 stars
28 (<1%)
1 star
13 (<1%)
Displaying 1 - 30 of 54 reviews
Profile Image for Megan Uhrynowski.
372 reviews5 followers
September 3, 2025
Another fast-paced thriller with a cliffhanger ending! These are my favorite kind of palate cleanser reads!
1,158 reviews3 followers
July 5, 2025
As always Elle Gray keeps you guessing until the very end. A fast paced thriller with Blake Wilder and her team working on 2 cases at once. On is a serial killer who wants Blake's undivided attention and the other is a black market seller of anything and everything criminals could want. currently it is a dirty bomb and the clock is ticking to find the bomb and the seller before it is to late.
Profile Image for Beverly Kay.
508 reviews10 followers
September 26, 2023
A Code to Kill by Elle Gray is book number 19 in the FBI Mystery Thriller series, and it did not disappoint me.
In true Blake Wilder style, she had me on the edge of my seat reading quickly to figure out how she could catch the bad guys. The ending was astonishing!
1,509 reviews3 followers
February 17, 2026
Good read

Really good 👍 story Relaxing intriguing and suspenseful Could not put it down Looking forward to the next story Thank you
Profile Image for Angela.
9,544 reviews128 followers
May 6, 2026
3.5 - 4 Stars

A Code to Kill is the nineteenth book in the Blake Wilder FBI Mystery Thrillers series by Elle Gray. This is a binge-worthy cocktail of high-stakes suspense, emotional depth, and relentless twists. Across the sprawling series, we follow Blake Wilder (a fiercely intelligent FBI agent with a shadowy past as well as a personal vendetta) as she hunts killers, unravels conspiracies, and confronts the ghosts that refuse to stay buried.
What made this series stand out for me was the great balance of grit, intrigue, and emotion. The cases are sharp, fast-paced, and satisfyingly unpredictable, but it was Blake’s personal journey - her resilience, vulnerability, and razor-sharp instincts - that hooked me and had me completely invested in her and the outcome of each story.
If you love strong, complex heroines, morally tangled mysteries, and a series that keeps upping the stakes without losing its emotional core, then this is sure to be your next obsession.
A gripping, fast-burning thriller series that’s as much about justice as it is about survival - and it was impossible to read just one.
Happy Reading…
Profile Image for Connie B.
306 reviews12 followers
February 9, 2025
Most of us have a code we live by.
Some live their life altruistically, while others live by a more sinister code.
A code that only their victims know. A code to kill…

Fresh from a grueling joint operation with Spenser Song, FBI agent Blake Wilder continues to find herself being stalked and hunted down by an unknown culprit. The worst part is that they may be after her loved ones as well.

Still unable to identify her stalker, Blake meets up with Kit at a coffee shop.
There Kit gives Blake crucial intel about an arms dealer, with advanced weaponry.
A dealer that’s on a bloodthirsty path, a path that claimed the life of someone close to Kit. As Blake and her team investigate the case, they uncover a web of aliases, and a cryptic code name with a string of deaths connecting to it.

Dirty bombs, advanced weaponry, and a trail of silent victims.
Who is this elusive arms dealer? As Blake races against time to unmask the truth.
The only thing that is certain is this weapons dealer is on a path of bloodshed.
And killing is not just a choice, it’s the only code they live by…
Profile Image for Angela.
3,525 reviews33 followers
August 29, 2023
A fantastic thriller story and series!

This was a heart pounding, action packed, intriguing thriller that will hook you from beginning to end. Wilder and her team have their hands full with several cases, and are reaching a breaking point. It's certainly going to be another wild ride for this awesome group of Agents. It's definitely not a story or series that you'll want to miss!
I would definitely recommend this book, series, and outstanding author.

Can't wait for the next release and more of this fantastic series!
13 reviews
Read
September 29, 2023
Great read😍

Cannot wait for the next book. Little disappointed that you put in Kit needed help considering the background you have for her experience. We should not have needed help and especially from a rookie. Her , Blake and Astra has been describe to be the best which is what so thrilling about your books. So please don't verve off. Your books are so fantastic, thrilling and full of action and suspense. Everyone should read this series if they like strong smart women, action frankly a great read,
430 reviews4 followers
September 9, 2023
A Code to Kill(Blake Wilder FBI Mystery Thriller Book 19)

OMG!!!!!!!!!!!! This book was amazing. Blake and her team took down "ghost", an arms dealer that the CIA didn't even believe was real and now it looks like she may have an idea, who is sending her body parts. She also took down a Bulgarian mafia king pin, someone who not only sold guns but was also into drugs, prostitution and trafficking women and young girls.
127 reviews1 follower
September 3, 2023
FBI thriller

Blake Wilder is working a serial killer case involving her. Her sister Kit shows up for help on a major arms dealer that has dirty bomb for sell. The sisters join forces to go after the arms dealer that no one knows what she looks like.
Will they uncover this secret arms dealer in time.
Profile Image for Diana L. Wells.
395 reviews
September 23, 2023
Fast Paced Thriller

Blake and her team continuing work on another serial killer case, this one is personal. The killer almost killed her team member Lucas and even though Ayad, her section chief, has told her hands off, she continue to cobble together clues as the killer leaves a new corpse every three days. Kit has returned and needs Blake’s help find an enigmatic arms dealer, purportedly selling a dirty bomb. Twists and turns and cut backs keep you reading far into the night.
276 reviews
February 24, 2024
good book

Blake gets a new agent to her team that’s like a younger Blake. She’s doesn’t follow orders very well, but she’s not shy about stepping up. Her sister Kit shows up & wants Blake’s help finding someone trying to sell a dirty bomb, The guy who wants Blake’s full attention is dropping bodies every 3 days.
1 review
January 24, 2025
green eyes

The only thing that bothers me about your books, but don’t get me wrong. I love them. But only 2% of the world population has green eyes ,little bit more in the US but at least half or more of the people in your books have green eyes sorry Its just one of those little things that drives me crazy , but I thoroughly enjoy your books
Profile Image for Vicki Gilbertson.
431 reviews11 followers
August 25, 2023
Bang what a way to end the story.  I wasn't expecting Boyle to be such a little hard ass, I like her. 

It was was having Kit back in the game.  You sure know how to get Rick's undies in a bunch, just as Brody.  


Looking forward for more of their adventures. Spencer Song is what I'm waiting for. 
21 reviews1 follower
August 27, 2023
Another winner!

Once again, Elle Grey has penned a phenomenal book! Blake Wilder is an amazing tough and talented agent! You never know what she is going to find herself involved in next. You have to read this series! It's fantastic!
1,507 reviews7 followers
August 27, 2023
A Code to Kill

OMG. This is a great thriller. This is the kind that you don't want to put down. I for one had to finish this book. Loved it. But I do hope the next book put',s an end to this story. I highly recommend this book.
360 reviews1 follower
September 2, 2023
I love this series!!

I love this series! There's always something going on. All the characters are awesome. So much drama and I am always sitting on the edge of my seat! Now I am waiting for the next awesome book! 😎
15 reviews1 follower
September 14, 2023
Very nice

I hate to see this end. Hopefully another book is in the works. I have been convalescing for a little while and these books have been a way of enjoying the time. I have loved everyone of them. Thank you for a great time.
497 reviews1 follower
September 18, 2023
May this not be a possibility!

Kit draws Blake into a fight with a beautiful,deadly arms dealer. As Blake's team begins to unwrap the layers, she finds herself on a dangerous road.
Profile Image for Patricia A. Biba.
415 reviews1 follower
October 4, 2023
Two Important Problems.

Enjoyed reading a Blake Wilder mystery again. The characters really work together to solve the problems. The problem Kit brought to Blake was an interesting subject . But there is another problem to be solved .
Profile Image for L E.
858 reviews1 follower
October 7, 2023
I have waited for this book, to have the sister finally working together was all I had been asking for. N
Sad about Lucas bit am happy about the new addition, can't wait to see where the next book takes us.
17 reviews
October 21, 2023
Great series

I love the Blake Wilder series! Every book has a great story line that makes me not want to stop reading! Very suspenseful! I love how there's a bigger storyline that goes on for several books. Can't wait till book 20!!
42 reviews
January 10, 2024
Loved it! Again!

Another week with book that kept me engaged from start to finish. The character development is fabulous. It's all I can do to put it down when it's time to leave for work. Can't wait for the next one.
55 reviews
May 1, 2024
Amazing

Ms Gray never ceases to amaze me, once I pick up her book I usually don't put it down until I finish. Her story line doesn't drag on and I'm always surprised one way or another. Please keep Blake alive and solving crime!
3 reviews
September 8, 2024
This series is the very best I've ever read. This is the 1st review I've written. But it's the kind of series you can't put down. I'd be repeating myself after each book. It's taken me 2 months to read 19 books in this series. Can't put the book down.
128 reviews1 follower
October 20, 2024
Loved it!!

So happy that Kit is back and I love Paige. She adds a new detention to the group an I'm assuming that Lucas won't come back unless in a different capacity which I think would be great.
307 reviews1 follower
March 27, 2026
another winner…

In a stellar thriller series. I don’t do plot summaries, I just do rah, rah enthusiasm and an exhortation to pick up the book. Start at book one to savor the full experience of Blake Wider and her team. You’re welcome.
798 reviews2 followers
August 19, 2023
This book was outstanding with Blake and team going all out to find a dirty bomb and who is responsible. This book did not disappoint with lots of suspense and action. Thank you
86 reviews
August 29, 2023
Love it

The Blake Wilder series has become one of my favorites. This is one of the best in the series. I can't wait for the next one.
12 reviews
August 30, 2023
These stories are ones that you can’t put down. Fantastic writing of the FBI and Agent Blake Wilder. Hav read the entire series and know hey just keep getting better.
Displaying 1 - 30 of 54 reviews