The Final Cipher: A heart-pounding thriller and conclusion about power, privacy, and the price of choice in a connected world (The Last Message Trilogy Book 3)

The Last Message Trilogy Book 3 · Hendry Publishing Ltd · AI-narrated by Archie (from Google)
5.0
1 review
Audiobook
3 hr 35 min
Unabridged
Eligible
AI-narrated
Ratings and reviews aren’t verified  Learn More
Want a 21 min sample? Listen anytime, even offline. 
Add

About this audiobook

One last code. One final choice.

Rumours say Lionel Gage is dead. The truth is far more dangerous.

When Maya Dalton receives a mysterious thumb drive labelled ‘THE FINAL CIPHER,’ she and Alex are thrust back into the shadows of their past. The file is tied to ‘Nightfall,’ the off-books MI5 programme that trained Alex Rennie—and it reveals a chilling truth: ‘Nightfall’ never ended. It evolved.

Their search leads to a forgotten Cold War island turned digital fortress, run by ‘The Architects,’ the hidden founders of global surveillance. And now, they’re ready to unleash OBSIDIAN, a sentient system that will control the world under the guise of security.

As a storm rages, Alex and Maya infiltrate the island, facing traps, betrayal, and a gut-wrenching dilemma: destroy OBSIDIAN and risk global collapse, or let it live—and watch freedom die. But Maya has one last move.

A final patch. A fading signal. A system undone.

The truth gets out. But the cost is everything.

The Last Cipher is a heart-pounding conclusion about power, privacy, and the price of choice in a connected world.

Ratings and reviews

5.0
1 review
Laura Rose
July 1, 2025
I was as entertained by this third book as I was by the first two books in the series. I applauded the actions of Alex and Maya as they worked to overcome almost impossible odds. I was on-the-edge of my seat as the story unfolded to its combustible ending. I liked that the story was contemporary and something that could come about in the not too distant future. I thought the digital voice narration by Archie G was clear and easy to follow. I was given a copy of the audiobook.
Did you find this helpful?

Rate this audiobook

Tell us what you think.

Listening information

Smartphones and tablets
Install the Google Play Books app for Android and iPad/iPhone. It syncs automatically with your account and allows you to read online or offline wherever you are.
Laptops and computers
You can read books purchased on Google Play using your computer's web browser.

Continue the series

More by Stephen Bentley

Similar audiobooks