Knights Templar - The Hidden Cipher

“Gripping”—and Rich Petrelli’s The Hidden Cipher is exactly that… a relentless chase through ancient secrets, modern power, and the shadows between.

Drawing on real Templar legends, authentic European locations, and centuries-old mysteries, The Hidden Cipher weaves documented history into a high-stakes modern thriller.

When a forbidden Templar manuscript resurfaces after seven centuries, cryptologist Dr. Elena Voss is the first to recognize the symbols etched inside—and the deadly warning buried beneath them. What begins as a routine analysis pulls her into a conspiracy protected by silence, blood, and a hidden order determined to reclaim the cipher at any cost.

Readers of Dan Brown, Steve Berry, James Rollins, Simon Toyne, and Raymond Khoury will feel instantly at home in this pulse-pounding thriller that blends historical mystery with relentless modern danger. The Hidden Cipher explodes out of the gate with breakneck pacing, international intrigue, and a mystery carved into the bones of history.

Joined by covert operative Antoine Rousseau and researcher Liam Hayes, Elena follows a hidden lattice of encrypted symbols across Europe—through echoing cathedrals, forgotten monasteries, restricted archives, and the sealed chambers of Templar strongholds. Each revelation pulls them deeper into a silent war that has smoldered for centuries… and every step forward stirs enemies who have killed to keep this truth buried.

Because the cipher doesn’t just rewrite history—it reveals a truth powerful enough to end the human race.

In this electrifying, globe-spanning thriller, descend into a world of forgotten orders, encrypted manuscripts, and conspiracies guarded for seven hundred years...until now.

“A clever thriller that pulled me in fast.”
“An exhilarating, action-packed historical thriller.”

Uncover the cipher. Follow the trail. Own the thriller readers can’t put down.

Rich Petrelli writes thrillers that pull readers into a world where ancient mysteries and cutting-edge science collide. The Hidden Cipher marks the beginning of the Templars Legacy Trilogy, a sweeping saga driven by history, genetics, and faith.A lifelong martial artist, Rich adds realism to every fight scene, and his love of travel fuels the adventures he brings to life-chapter by chapter.