Silver Gravity Books
The Decrypter and the Beale Ciphers:The Calla Cress Decrypter Thriller Series, Book 6 - Rose Sandy
The Decrypter and the Beale Ciphers:The Calla Cress Decrypter Thriller Series, Book 6 - Rose Sandy
Thriller & suspense, Action & adventure, Technology, History, Crime & mystery, and Suspense
Book Number in Series
Book Number in Series
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Two hundred years ago, a man hid a fortune and left behind three encrypted letters. No one has cracked them until now.
A 200‑year‑old cipher hides a secret that could reshape the world. When a legendary set of encrypted letters finally begins to yield its secrets, British Museum curator and codebreaker Calla Cress is framed for the disappearance and murder of her best friend. Forced on the run, she must decode the Beale Ciphers and stop a vengeful foe before the codes unleash a plan that threatens civilisation.
What if the world’s greatest cipher wasn’t about gold but about power?
When Calla Cress and her friend Jack Kleve discover ancient wall paintings and a mysterious telescope in a New Mexico cave, they realise the Beale Ciphers might be more than a legend.
Moments later the cave collapses, Jack disappears, and Calla becomes the prime suspect in his murder. Discredited and on the run, she travels to North Africa following Jack’s clues and encounters mercenaries, treasure hunters and a vengeful foe with a deadly plan for the ciphers.
Haunted by a recent loss and hunted by her own government, Calla must trust Halona Osa‑Menglian, a descendant of the Wampanoag people and guardian of the telescope, and decode a centuries‑old number sequence painted by her ancestors.
From sacred caves and desert hideouts to Moroccan souks and secret intelligence offices, the chase becomes a race against time to prevent a plan that could unleash chaos.
Fans of Steve Berry, Clive Cussler and Jason Bourne will devour this high‑stakes techno‑thriller where history, cryptography and espionage collide.
The legend of the Beale Ciphers is one of America’s enduring mysteries: three encrypted letters said to point to a hidden treasure in Virginia. In The Decrypter and The Beale Ciphers, author Rose Sandy reimagines what would happen if the code were finally cracked – and if its secrets were far more dangerous than gold. This blog post explores the novel’s themes, tropes and exotic locations.
Reader Praise
“Another fast‑paced adventure with twists that keep you guessing”
“Action‑packed and exciting – the book opens with a murder, a wedding and a kidnapping, and it never lets up”
“Calla, Jack and Nash must go it alone this time, and the tangled plot reveals how everything is connected”
“I kept learning more about the characters – this series always leaves me wanting more”
Tropes You'll Love:
Locations & interesting places in the book
Chihuahua Desert, New Mexico: The opening set‑piece features a cave filled with ancient murals and numbers. The desert’s harsh beauty and dangerous caves set the tone for the adventure.
London, UK: Calla’s base at the British Museum provides a contrast of scholarly research and political intrigue. Here she is framed and forced into exile.
North Africa (Marrakech & coastal island): Vibrant souks, ancient mosques and hidden vaults provide the backdrop for high‑octane chases and the climactic showdown. Calla sails the Scorpion Tide to a secret island to access the vault.
Bedford County, Virginia: Historical references to Thomas Jefferson Beale’s original ciphers remind readers of the real‑world legend
Listen to the series here:
ABOUT THE SERIES
ABOUT THE SERIES
Calla Cress is no ordinary museum curator. By day, she manages ancient manuscripts, Byzantine relics, and rare artifacts at the British Museum. But in the shadows, she’s a top operative, for a covert multi-government spy agency. With unparalleled skills in cryptography, ancient languages, and digital intelligence, Calla is known as The Decrypter,the one they call when the stakes are global and the clues are buried deep in history.
The Calla Cress Technothriller Series
Introduction: The Curator and the Code
Calla Cress is a brilliant curator at the British Museum, a woman whose unparalleled command of history and ancient languages has made her a luminary in the academic world. Her quiet life shatters when she’s recruited to decipher a cryptic, long-lost manuscript written in an apparently unbreakable code. The secrets locked inside are no mere curiosities: they map the location of resources that could make crude oil look obsolete. Thrust from scholarly halls into the shadows of global espionage, Calla learns that priceless artefacts can be triggers for future wars—and her first mission is only the beginning.
The Scope of the Conspiracy: A Global Race Against Time
What starts with a single manuscript escalates into a worldwide battle against a cascade of interlinked threats. The Calla Cress series blends historical mystery, high-stakes international espionage, and cutting-edge technothriller energy. From London and Paris to the deserts of Morocco and the jungles of the Congo, Calla and her allies piece together clues centuries in the making. Hunted at every turn by relentless foes—wielding carbonado diamonds and moving like computer-augmented phantoms—they bend physics and technology to their will. With each book, the stakes rise and the pace accelerates, as Calla uncovers a conspiracy vast enough to bring the world to its knees.
A Promise to the Reader: Unforgettable Adventure
Expect an action-packed ride from first page to last—breathless momentum with brains and heart. Each instalment delivers intricate mystery, breathtaking suspense, and relentless thrills. If you love globe-trotting puzzles, fierce heroines, and technothrillers that never let up, the Calla Cress series belongs on your shelf.
Main Characters
Calla Cress—the series protagonist—is a British Museum curator and ISTF agent on a personal crusade to uncover her origins and the truth behind her genetically enhanced abilities. Facing cryptic codes and dangerous foes, her journey pushes her cyber-espionage skills to the limit. Across the series she evolves into a formidable operative, determined to reconcile the mysteries of her past with her present while battling adversaries who weaponise her own secrets against her.
Jack Kleve is the quintessential ally—a visionary tech entrepreneur and ISTF operative who lends his skills to Calla Cress and Nash Shields. While navigating corporate rivalry and the murky ethics of rapid technological advancement, his arc bends towards recognising the greater good over profit. Jack’s devotion to Calla adds a personal dimension to his conflicts, intertwining the professional with the emotional. His shift from profit-driven inventor to socially conscious partner marks a pivotal transformation in the series.
Nash Shields, an NSA and ISTF agent, is the steadfast protector and love interest, driven by a profound sense of duty. He confronts formidable enemies and complex political networks while safeguarding vital technologies alongside Calla. His journey forces him to question the ethics of his mission, balancing loyalty to his agencies with a deepening moral awareness. Torn between professional duty and personal feelings, Nash walks a precarious line between love and allegiance.
SERIES READING ORDER
SERIES READING ORDER
The Calla Cress Decrypter Thriller Series In Order
- Book 1: Secret of the Lost Manuscript
- Book 2: The Mind Hacker
- Book 3: Digital Eyes Only
- Book 4: The Storm’s Eye
- Book 5: The Pythagoras Clause
- Book 6: The Beale Ciphers
- Book 7: Atlantis of the Sands
- Book 8: Kingdom of Diamonds
- Book 9: The Falcom Syndrome
- Book 10: The Queen of Sheba
- Book 11: The Calculus Warning
- Book 12: The Cobra Paradox
- Book 13: Room of Martyrs
- Book 14: Eiger Mosaic
- Book 15: Enemy of Wolves
- Book 16: The Pharaoh's Mask
- Book 17: The Eternity Hypothesis
- Book 18: The Sculptor's Code
- Book 19: The Solomon Agenda
- Book 20: The Pheonix Cipher
- Book 21: The Cairo Key
- Book 22: Red Fox Agenda
- Book 23: Phaistos Disc
- Book 24: Scorpion Gold
READ A SAMPLE
READ A SAMPLE
Meet the Author
Meet the Author
Rose Sandy writes adventure thrillers that blend espionage, technology, and history into fast-paced adventures. Her stories dive into the world of covert intelligence, scientific breakthroughs, and global conspiracies, perfect for readers who love suspense with a twist of "what if?" Whether you're on a morning commute or relaxing on a Sunday, her books promise to entertain, surprise, and transport you to hidden corners of the world.
A true globetrotter and lifelong communicator, Rose draws inspiration from historical archives, cutting-edge tech, and conversations with intelligence insiders. When she's not researching in the British Library or exploring Churchill’s War Rooms, she’s crafting thrillers that weave intrigue, action, and a hint of romance. Discover more here or join her newsletter at subscribepage.io/Wuqko4.
Tropes You'll Love
Tropes You'll Love
- Unsolved historical cipher
- Treasure hunt & secret code
- Framed for murder
- Betrayal & revenge
- Ancient technology meets modern espionage
- Cultural heritage & identity
- Race against time
- Female-led spy adventure
- Friendship & trust
- Global chase
Audio Book Sample
Audio Book Sample
Other Book Details
Other Book Details
Technothriller, Action Adventure, Historical Mystery, Treasure Hunt, Cipher Thriller, Conspiracy, Espionage, Women’s Adventure, Science Fiction Thriller, Global Mystery
FAQs
FAQs
Another fast-paced adventure with twists that keep you guessing what will happen next. An excellent follow up to the previous tales.
This is an exciting fun read. There is so much going on if you like action you will like this book. The book opens with a murder, then you have a wedding and Jack is kidnapped. Calla goes in to work and finds she has been betrayed. They think she is a traitor and has killed Jack. She manages to escape and has to figure this all out to save herself and the others. This is a stand alone book in the series and can be read in any order. The other books in the series are great reads and it would help you to know the characters better if you were to read them first. But if you don't you will end up going back and reading them later.
The Decrypter and the Beale Ciphers, is not only a great read, but it keeps you wanting more. One of the things that I love about the book is that you keep learning more about the characters. The twists that you see makes this one of the reasons I love it. Take it from me and you will thank me later for it, get, The Decrypter Series Full Box Set if you don't have it yet, it will add to your pleasure of reading The Decrypter and the Beale Ciphers.
The Decrypter and the Beale Cipers is an enjoyable read. Calla, Jack, and Nash must work alone this time. Calla must decipher the Beale papers, Nash must go on a mission of his own to help an friend, and Jack is kidnapped. Eventually the plot reveals that all events are related and other characters come in to play in order to get the three back together where they belong. I really liked this book and the entire series. Even though the books can be read as stand alones, I think it's better to have read each previous book as there are references to other characters and events that might be a bit confusing. Definitely recommend the series.
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