by S.C. Godfrey
Release Date: August 11, 2026
2026 Pamela Dorman Books
Ebook ARC; 336 Pages
ISBN: 979-8217059676
ASIN: B0G1X3L12N
Audiobook: B0G1XPLKHF
Genre: Fiction / Thriller / Romance
Source: Review copy from publisher
3 / 5 Stars
Summary
Zoe Wilder has the unflashy, solitary life of an academic, studying ciphers in literature at a California university. When her research takes her to a cryptology conference in Madrid, she’s not expecting to trigger the Enigma Challenge, a clandestine puzzle competition few dare to enter.
The Enigma Challenge is an infamous competition with impossibly high stakes: Lose, and your identity is wiped forever. It doesn’t take long for Zoe to realize that she’s in over her head. Enter Dane Seaver: the mysterious hacker who insists they team up. Dane knows the Enigma Challenge—its secrets, its players—and Zoe knows ciphers. For better or worse, they need each other.
Six days, five puzzles, three countries, and innumerable rivals. What’s more, the spark of attraction between them becomes harder to ignore, but distractions are dangerous. With twelve million dollars and multiple lives on the line, the Enigma Challenge is anyone’s game.
The Enigma Challenge is an infamous competition with impossibly high stakes: Lose, and your identity is wiped forever. It doesn’t take long for Zoe to realize that she’s in over her head. Enter Dane Seaver: the mysterious hacker who insists they team up. Dane knows the Enigma Challenge—its secrets, its players—and Zoe knows ciphers. For better or worse, they need each other.
Six days, five puzzles, three countries, and innumerable rivals. What’s more, the spark of attraction between them becomes harder to ignore, but distractions are dangerous. With twelve million dollars and multiple lives on the line, the Enigma Challenge is anyone’s game.
My Thoughts
The Enigma Challenge was a decent book and I did enjoy the actual challenge even if I found the romance cringey and didn't really feel the connection romantically between the two main characters. I definitely enjoyed the descriptions of the different locales having visited most of them (except Madrid), and could picture myself in each of the locations. And while I did enjoy the puzzles, I wish they had been a bit more challenging considering this was supposed to be a really difficult competition and only the best cryptographers would have a chance at winning. How difficult is it if someone can solve it in less than an hour?
I can't say the plot moved along that quickly as there were definitely some slower parts to this story, but while I was hoping for more thrills and action, I didn't necessarily find it boring. However Zoe's teenage crush on Dane quickly became annoying and the constant crushing on him grew old fast. The Enigma Challenge is supposed to be very difficult and people get hurt, and while Zoe and Dane did have a couple of close calls, most of those were avoided due to convenience and I never felt like they were in any danger. And in the wilds of Scotland, the author never really explained how Zoe, who has never hiked a day in her life, managed to get to the location in the wilds even if she was with someone else. As someone who hikes a lot, this sort of bothered me because this would not be easy to do and she was injured on top of it. So yeah, a bit of suspension of belief was necessary for some parts of this book.
So, let's talk about Zoe, a woman who wants to play the enigma challenge, but really has no clue what it is or what the consequences of the game could be. Yet, she goes along with a man she has just met and trusts him with her life to complete a challenge she really knows nothing about. And gets upset when this same person doesn't reveal his whole life to her as they compete because you know, he should definitely trust a stranger with all his information as well as 'trust is so important'. Holy hell! You're in a game with someone you don't know, the stakes are super high, and you get 'mad' because this person doesn't trust you. I felt like we were in high school all over again. And don't even get me started on the underwear thing. So cringey I almost DNF the book at that point. What kept me going were the puzzles and the descriptions of the locations. But then, once they get the puzzles, they dine in public locations to solve the puzzles. The only good thing about this was the descriptions of the food. Considering Dane had played this game before you would thing he would be a lot more aware of how dangerous it could be and know how to take precautions in public areas. But no. Let's just take stroll down a road and hope no one else finds us on this busy street with cameras everywhere.
Verdict
The Enigma Challenge was an okay book and I did enjoy the challenges even if I thought the romance was cringey at best and the suspense and thrills were somewhat lacking. There was little description of the other players in the game except for a couple of them so I have no idea about the game itself, its global power or anything else and for a corporation that is supposed to be everywhere, this information was seriously lacking in this book. The puzzles were interesting but anyone fascinated with cryptology may find them not as difficult as they should have been considering the prize at the end of the game. I don't really know to whom I would recommend this book as it's not really a romance, and personally, I hate stupid miscommunications as a trope and they were used a lot in this book, and I don't think there is enough action in it for action/thriller readers. Perhaps this would be perfect for those readers just looking to start reading the action/thriller genre and are feeling overwhelmed.








