The Decrypter: Secret of The Lost Manuscript - Book 1 (EBOOK)

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When your life was built on a lie, discovering your true identity can be deadly.

When Calla Cress joins an elite taskforce to investigate the mysterious Hadrius Manuscript, she uncovers a conspiracy that connects her troubled past to a global threat hidden in plain sight.

Calla Cress has been searching for her missing parents for her entire life. She thought the mystery was long buried, but when a two-thousand-year-old manuscript with an unbreakable code lands in her hands, she is suddenly thrust into a desperate race against time.

As the British Museum curator deciphers the cryptic message, she becomes the target of a secret government agency enemy determined to keep the truth hidden at all costs. When the manuscript vanishes in Berlin, Calla realizes that the key to her family's disappearance may be encoded in the ancient text.

With no time to lose, Calla, NSA security advisor Nash Shields, and tech entrepreneur Jack Kleve set off on a globe-trotting mission to decode the riddle and uncover a shocking technological breakthrough. But as she battles against skilled assassins and unravels the layers of deceit, she realizes that nothing in the modern or ancient world is as it seems.

As the clock ticks down, Calla must risk everything to solve the mystery of her missing parents and prevent a dangerous new world from being unleashed. This is a race against time that she cannot afford to lose.

Experience the rush of danger and the thrill of the chase in this thriller, perfect for fans of Ernest Dempsey, Jason Bourne, Steve Berry, Scott Mariani, and Clive Cussler.

Reader Praise

"Calla's search for her identity had me completely invested—I was rooting for her from page one. The chemistry between her and Nash absolutely sizzled, and I'm already dying for book two!"

 "What starts as a cryptography puzzle evolves into something much deeper about identity and belonging. Sandy weaves historical elements with modern technology in ways that feel both authentic and thrilling."

The Calla Cress Decrypter Thriller Series Reading 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

Find the Full series here.

Click here for the full reading guide.

Meet the Author  Rose Sandy

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.

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