Jump to ratings and reviews
Rate this book

Killer Concept: A Psychological Thriller

Rate this book
Five women.
One standing lunch date.
And conversations that should have stayed harmless.

They meet at the same café, at the same table, on the same days every month. It’s tradition, easy laughter, shared history, and the kind of honesty that only comes with time.

They talk about marriage. Frustration. The small irritations no one admits to caring about.

Sometimes, they joke.

Then one husband dies.

The loss is sudden. Tragic. Supposedly unrelated. But grief has a way of sharpening memory, and the women begin to notice things they never paid attention to before, glances that linger, questions that feel oddly timed, details that don’t quite belong.

As the group begins to fracture, each woman is forced to confront a disturbing that something said in passing may not have disappeared as easily as they believed.

And that the most dangerous presence is often the one no one thinks to watch.

Killer Concept is a dark psychological thriller about friendship, silence, and the unseen consequences of what we say aloud.

283 pages, Kindle Edition

Published January 23, 2026

Loading...
Loading...

About the author

J.J. Jax

7 books9 followers

Ratings & Reviews

What do you think?
Rate this book

Friends & Following

Create a free account to discover what your friends think of this book!

Community Reviews

5 stars
9 (45%)
4 stars
4 (20%)
3 stars
3 (15%)
2 stars
2 (10%)
1 star
2 (10%)
Displaying 1 - 13 of 13 reviews
2,010 reviews16 followers
February 1, 2026
I received an ARC and I am voluntarily leaving an honest review.

This is a story about 5 women who became friends at college and since they all lived in the same area continued their friendship. The 5 women and their husbands initially started meeting for dinners, but the husbands did not enjoy them as well so they changed their routine. The 5 women now made a point to meet at a cafe on a schedule each Thursday and Saturday. At their meetings they talked about what was going on, and in one case they wound up playing a hypothetical game which related to their husbands. They believed it was harmless and no one in the read was aware of what they were doing. They later discovered that they had been overheard and all of a sudden, things were different.

Read along and follow the women and their lives get messed up and what they did in the end to resolve their issue. Find out what the game was that involved the husbands and what eventual role it played in the story. Learn who overheard them and how that individual knew them many years earlier.

The ending will answer any questions. It is worth a read.
Profile Image for Pam.
379 reviews4 followers
February 6, 2026
5 women who met years ago and keep their friendship going
with lunch ever week. They do this for years. They wanted
their husbands to come with them and in fact started with
dinners instead of lunches but the husbands don't enjoy each
other as much so they made the change. The women use the
lunches to vent about life, thinking that it was all just a
game. That is until one of the husbands end up dead, followed
closely by a second. Now they must figure out who is doing
this before the other 3 husbands die and maybe one of them
as well.

I received this book as an ARC and this is my honest opinion.
109 reviews1 follower
Read
February 4, 2026
5 women who've known each other for years routinely meet for lunch. They tried dinners with their husband's, but the men's personalities didn't mesh. The women would vent, chat, dream, etc. as most friends do. Venting led to what they thought was hypothetical games. Then 1 husband died, then another. The women became afraid and wondered which one would be next. They felt caught in a cat-and-mouse game. This is a thought provoking book and makes you think about possibilities, what-ifs, and the 'invisible' people you don't notice. It's a good read.
Profile Image for Valorie J.  Diamond.
50 reviews
February 9, 2026
JJ did it again! From the first chapter I was hooked. Great group of friends meeting up for drinks , having conversation. Lots of twists and turns just like life does and to be honest do you really know who is listening to your conversations when you are in public? You say something jokingly but did they hear it that way? Be careful what you joke about, someone might be listening…..

I received a complimentary copy of this book and this is my honest review.
Profile Image for karin  whitehead.
1,238 reviews13 followers
March 11, 2026
Killer Concept

I read this novel as an ARC. This is my review. Five ladies meet for coffee and chats at the Blue Heroin Cafe every Thursday and on Saturday's. They first started having the husbands join them for dinners. But soon realized the husbands didn't click. Then the first husband dies in what appears as medicine mix up. A fast paced, great character's, and a believable storyline. A really interesting concept/plot.
Profile Image for Sammye.
5,398 reviews40 followers
February 6, 2026
Killer Concept is a thought provoking psychological thriller that kept me on the edge of my seat! I was hooked from the first intriguing chapter. So many twists and turns and so much drama. An amazing read.
73 reviews1 follower
May 27, 2026
A terrifying thought

Five women who meet regularly, speaking their minds on things they dream about. Talking foolishly not realizing that someone is always listening. It leaves you wondering if someone has been listening to you.
I definitely recommend this book.
9 reviews
May 28, 2026
predictable from the start

There was no suspense, psychological or otherwise. The reader realizes the server is important to the story because of the details the author gives. Waste of time.
Profile Image for Mikael Nordgren.
29 reviews1 follower
February 2, 2026
Good book with lots of characters and friendships. Nice with a story that circling round a group of friends that meets regularly at a diner. I liked the plot and the style.
1,944 reviews18 followers
May 11, 2026
A mysterious waitress
A group of women complaining about their husbands
Profile Image for Emma Riccio.
120 reviews1 follower
June 23, 2026
SO GOOD! a bunch of OCD women in bad marriages In a thriller drama that’s a mix between big little lies and pretty little liars.
Profile Image for Roger.
6,115 reviews31 followers
January 30, 2026
Killer Concept: A Psychological Thriller, my fifth read from author JJ Jax. A 283-page Psychological Thriller. Even though the killer was given away way too early in the book and *SPOILER* the painting was way too obvious, still, it was a wonderful read. I was given a complimentary Kindle copy of this book & I'm voluntarily reading & reviewing it. The gifting of this book did not affect my opinion of it. I look forward to my next read from this author as they're published. (RIP Marley January 20, 2014 - July 24, 2018).
Displaying 1 - 13 of 13 reviews