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Memento Mori - 111
Not yet published
Expected 1 Jun 26Four strangers. One shared birthday. A devastating crash. And a device that counts down to their exact moment of death.
Isla, Gareth, Ollie, and Ellie all share the same birthday - 29th February 1992. After narrowly surviving a multi-car pileup on London's Putney Bridge, the four are recruited by Vita, a powerful and secretive biotech corporation, for a highly classified clinical trial. The product? "The Memento". A revolutionary smartwatch that calculates a user's remaining lifespan down to the very second.
As their individual countdowns begin, the trial takes a dark and terrifying turn. From miraculous surgeries to sinister corporate motives, the group soon uncovers that the brilliant but mysterious Dr. Ellisen is hiding a world-shattering secret involving timeline manipulation and the true cost of their survival.
When Vita's ruthless CEO attempts to weaponize the technology, the four test subjects must band together to expose the truth before their own time runs out for good.
A gripping, fast-paced sci-fi thriller exploring mortality, corporate greed, and the ultimate value of time.
Isla, Gareth, Ollie, and Ellie all share the same birthday - 29th February 1992. After narrowly surviving a multi-car pileup on London's Putney Bridge, the four are recruited by Vita, a powerful and secretive biotech corporation, for a highly classified clinical trial. The product? "The Memento". A revolutionary smartwatch that calculates a user's remaining lifespan down to the very second.
As their individual countdowns begin, the trial takes a dark and terrifying turn. From miraculous surgeries to sinister corporate motives, the group soon uncovers that the brilliant but mysterious Dr. Ellisen is hiding a world-shattering secret involving timeline manipulation and the true cost of their survival.
When Vita's ruthless CEO attempts to weaponize the technology, the four test subjects must band together to expose the truth before their own time runs out for good.
A gripping, fast-paced sci-fi thriller exploring mortality, corporate greed, and the ultimate value of time.
502 pages, Kindle Edition
Expected publication June 1, 2026
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Displaying 1 - 11 of 11 reviews
Review of advance copy received from Author
4.5 rounded up.
This book has really taken me by surprise.
I don’t usually read thrillers but this really intrigued me.
I guess I have a morbid curiosity because of the loss I’ve experienced in my life.
Would you want to know how long you had left to live? Would you want to know how long others had to live?
I like the thought that making good choices prolongs your life when I think of some choices that I’ve made.
The book was fast paced and easy to read, I finished it within a couple of reading sessions. It kept me gripped and wanting to know more.
I could never have predicted the major plot twist and that’s a big selling point for me as a lot of books are so predictable.
I enjoyed the development of certain characters in this book, Gareth ended up becoming my favourite.
I wish the romantic connection had been explored a little more as it felt like it almost came from no where but it was really important to the storyline so I’m glad it was there.
I was emotionally wrecked by the end. It hit a bit too hard to home for me but I’m looking forward to book two.
Thank you for offering me the ARC for this book Matt
This book has really taken me by surprise.
I don’t usually read thrillers but this really intrigued me.
I guess I have a morbid curiosity because of the loss I’ve experienced in my life.
Would you want to know how long you had left to live? Would you want to know how long others had to live?
I like the thought that making good choices prolongs your life when I think of some choices that I’ve made.
The book was fast paced and easy to read, I finished it within a couple of reading sessions. It kept me gripped and wanting to know more.
I could never have predicted the major plot twist and that’s a big selling point for me as a lot of books are so predictable.
I enjoyed the development of certain characters in this book, Gareth ended up becoming my favourite.
I wish the romantic connection had been explored a little more as it felt like it almost came from no where but it was really important to the storyline so I’m glad it was there.
I was emotionally wrecked by the end. It hit a bit too hard to home for me but I’m looking forward to book two.
Thank you for offering me the ARC for this book Matt
May 20, 2026
If you love John Marrs books then you will absolutely love this! I was intrigued from the very beginning with the characters as they were all so different and deep. I honestly forgot that I was reading while reading this because it was so immersive and I just couldn’t wait to pick it back up. There were some extremely thought provoking moments throughout the book that really made me stop and think wha I would do in this situation. I also love the uk setting and the characters really resonate with me since I am also from England. There was a great twist towards the end that I would never have predicted and I found myself really rooting for the characters. I already can’t wait for the next book!
Review of advance copy received from Publisher
This book really makes you stop and think about time in a completely different way. It explores the idea of knowing exactly how much time we have left and how that kind of knowledge could change the way we live, love, and connect with others.
It made me wonder if people would love harder, worry less, be more present, and forgive faster if we truly understood how limited time really is. Most of us move through life assuming we have more time than we actually do, and this story challenges that mindset in such an emotional and thought provoking way.
The book was heartbreaking, beautiful, and deeply reflective. More than anything, it felt like a reminder not to take moments, people, or even ordinary days for granted.
It made me wonder if people would love harder, worry less, be more present, and forgive faster if we truly understood how limited time really is. Most of us move through life assuming we have more time than we actually do, and this story challenges that mindset in such an emotional and thought provoking way.
The book was heartbreaking, beautiful, and deeply reflective. More than anything, it felt like a reminder not to take moments, people, or even ordinary days for granted.
Review of advance copy
If you are a fan of dystopian soft sci-fi, refreshing writing techniques and fatally flawed yet heroically human characters momento mori is a must read.
It has mystery, suspense, thrill, realistic romance, and an utterly absurd unpredictable plot twist that would ordinarily be groan worthy and yet works so well within this world. And I really mean completely unpredictable.
My only regret reading this book is the length of time I must wait for a sequel.
An absolute masterpiece of an easy, yet gripping read, in my humble opinion.
I received a free copy of this book via Booksprout and am voluntarily leaving a review.
It has mystery, suspense, thrill, realistic romance, and an utterly absurd unpredictable plot twist that would ordinarily be groan worthy and yet works so well within this world. And I really mean completely unpredictable.
My only regret reading this book is the length of time I must wait for a sequel.
An absolute masterpiece of an easy, yet gripping read, in my humble opinion.
I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Review of advance copy received from Author
This book is something, I didn't expect to love it so much.
When I saw it on the socials of this author, I was really intrigued by it.
Honestly, I can't stop thinking about it, and what should I do in they're place, would I want to know when I am going to die, if I have years, months, days rest to live my life. I really don't know if I would want to know.
This story is well written, sometimes it is a little emotional roller coaster, I am really intrigued to know the rest of it.
It was a really fast read and a great read.
When I saw it on the socials of this author, I was really intrigued by it.
Honestly, I can't stop thinking about it, and what should I do in they're place, would I want to know when I am going to die, if I have years, months, days rest to live my life. I really don't know if I would want to know.
This story is well written, sometimes it is a little emotional roller coaster, I am really intrigued to know the rest of it.
It was a really fast read and a great read.
Review of advance copy received from Author
I am not exaggerating when I say I could not put this book down!! The story was right up my street and it was easy to follow, even with the multiple POVs. I really cared about what happened to each of the characters and was desperate to know what was going on! I went through so many different emotions reading this book which I didn't expect going in and the ending was really good. I will be thinking about this one for a long time.
May 12, 2026
5⭐️ I absolutely devoured this!! If you’re a fan of Blake Crouch / John Marrs, then you will love this multiple POV, near-future book! I was gripped the whole way through and felt connected to all of the characters, whilst having my mind blown by the plot twist!!! I never would have guessed it. I’m so happy that there’s going to be a sequel to continue this story and I already cannot wait to read it!
Review of advance copy received from Author
I absolutely loved this book! I devoured it in a couple of sittings, it was hard to put down. I loved the characters, the story and the way in which the story is written. I consider myself as an armchair detective, I can usually tell in advance what will happen etc but the twist at the ending I had no idea!! I cannot wait to preorder a physical copy, it’s worthy 100% and to read the next one! Would definitely recommend:)
Review of advance copy received from Author
I’m already calling it in as my favourite book of the year and would rate it more than 5 stars if it was possible.
The near future technology is quite terrifying and it really makes you think how you should be making the most of your life! The characters are likeable, even Gareth! And the storyline is gripping. Fantastic work Matt, can’t wait for more!
The near future technology is quite terrifying and it really makes you think how you should be making the most of your life! The characters are likeable, even Gareth! And the storyline is gripping. Fantastic work Matt, can’t wait for more!
Review of advance copy received from Author
This book is different to anything I’ve ever read. It was a fast paced, addictive storyline. I loved the characters and the plot. I didn’t enjoy one part of the twist but the rest of the book makes up for that. It was emotional at times but I like that aspect of a book. Can’t wait to read the other ones when they come out!
Review of advance copy
Leaving a review for this amazing book.
Received a copy from Booksprout and I must say it exceeded my expectations. Very excited for this to come out and have it on my shelf ☺️
Received a copy from Booksprout and I must say it exceeded my expectations. Very excited for this to come out and have it on my shelf ☺️
Displaying 1 - 11 of 11 reviews