Jump to ratings and reviews
Rate this book

The Hidden Cipher: A Knights Templar Conspiracy Thriller

Rate this book
A stolen Templar codex. A vanished order.
A secret worth killing for.


When a lost manuscript surfaces after seven centuries, cryptologist Dr. Elena Voss instantly recognizes the symbols—and the danger. The Codex contains fragments tied to a mystery buried deep within Vatican vaults, medieval strongholds, and forgotten Templar archives… a truth powerful enough to rewrite history.

But Elena is not the only one hunting it.

A covert network—descended from the same forces that once destroyed the Templars—will do anything to reclaim the fragments first. As Elena races across Europe with field operative Antoine Rousseau and researcher Liam Hayes, every new clue pulls them deeper into a conspiracy guarded by blood and silence.

Pursued through cathedrals, crypts, monasteries, and Templar fortresses, they decode a chain of symbols left behind by the Order—each pointing toward a revelation their enemies are desperate to keep buried.

Because unlocking the cipher doesn’t just expose the past.
It unleashes something far more sinister.

Some secrets were never meant to be found.

Perfect for fans of Dan Brown, James Rollins, and Steve Berry, Knights Templar – The Hidden Cipher delivers a relentless blend of historical conspiracy, Vatican intrigue, and ancient cryptography—an atmospheric thriller that will keep you turning pages deep into the night.

406 pages, Paperback

Published December 5, 2025

21 people are currently reading
12 people want to read

About the author

Rich Petrelli

22 books
Author also write as Color and Quill

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
12 (80%)
4 stars
3 (20%)
3 stars
0 (0%)
2 stars
0 (0%)
1 star
0 (0%)
Displaying 1 - 8 of 8 reviews
Profile Image for Steve Rufle.
196 reviews8 followers
Read
November 24, 2025
Amazing Read.

Really enjoyed the adventures of Elena, Antonio and Liam.

Looking forward to the next book in the Trilogy.

Received as an ARC with no expectation of a positive review.
24 reviews1 follower
December 11, 2025
I got completely drawn into the chase across Europe in this book. The combination of ancient Templar secrets and modern-day danger felt so exciting that I was constantly turning pages to see what would happen next. Elena’s discoveries about the manuscript and the codes she uncovers kept me guessing, and every revelation added another layer to the mystery. I loved how the story moves through real historical sites, making it feel like you are right there with the characters, facing the dangers and unraveling centuries-old secrets. The tension never eases, and the puzzle at the center is genuinely intriguing, making it a thrilling adventure from start to finish.
This entire review has been hidden because of spoilers.
17 reviews
December 8, 2025
A Gripping Fast Paced Thriller that Pulls Readers In!

A gripping, fast-paced thriller that blends history, mystery, and action in all the right ways. “The Hidden Cipher” pulls readers into a world of ancient secrets, cryptic codes, and relentless pursuit. Dr. Elena Voss is a compelling heroine, and the vivid settings and historical depth rival Dan Brown at his best. A must-read for conspiracy fiction fans!
Author 14 books1 follower
December 9, 2025
Dr. Elena Voss discovers an ancient manuscript that contains clues to a powerful secret that she later learns is very dangerous. She travels across Europe with her team to decode symbols hidden in monasteries, fortresses, and crypts. But—her team is being hunted down. This novel is full of mystery and intrigue. A very good read! Looking forward to Book 2!
25 reviews
December 10, 2025
I am enticed with signs and symbols and anything like this book that pivots around it. Elena is my hero and her skills in decoding and interpreting what all eyes take for granted is spellbinding in this captivating thriller. Legacy transfers and preservations is never easy when warring is inevitable.
30 reviews
December 9, 2025
elena voss is smart and real, the codes actually make sense, and the chase scenes kept me up late. history parts felt solid without slowing things down. only gripe is it ends too quick, want the next one already. good thriller if you like smart action.
21 reviews1 follower
December 11, 2025
A gripping mix of Templar secrets, clever codes, and nonstop action. Elena Voss is a fantastic lead, and the plot keeps you turning pages. Perfect for fans of Dan Brown. Can't wait for Book 2!
Displaying 1 - 8 of 8 reviews

Can't find what you're looking for?

Get help and learn more about the design.