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Beneath the sands of Egypt lies a technology that could rip continents apart.

When a golden mask from a forgotten pharaoh’s tomb reveals advanced engravings and awakens an ancient seismic network, British Museum curator Calla Cress becomes humanity’s last line of defence. Pursued across the Mediterranean by a ruthless collector and a shadowy operative, she must decode hidden inscriptions and confront truths about her heritage and pregnancy before a precision earthquake weapon destroys millions.

A gold mask. An ancient code. A seismic weapon that could rip continents apart. 

At the grand unveiling of a mask from an unnamed pharaoh’s tomb, British Museum curator and secret ISTF operative Calla Cress feels an inexplicable resonance that pulses through her very DNA. Beneath the mask’s ornate hieroglyphics, hidden inscriptions reveal intricate circuit‑like designs and mathematical formulas that should not exist in a relic three thousand years old. Minutes later, a coordinated theft shatters security, and the priceless artefact vanishes.

Calla and her allies, NSA strategist Nash Shields and tech genius Jack Kleve—disobey orders and follow clues left by Calla’s former professor Dr. Chenzira Awad. Their hunt uncovers a dormant network of nodes scattered beneath Egypt’s Western Desert, Istanbul’s ancient cisterns and the volcanic caverns of Santorini. Created by unknown operatives to dampen earthquakes, the system could become the deadliest seismic weapon in history if it falls into the wrong hands.

Pursued by ruthless financier Anwar Shoukry and manipulated by the enigmatic operative Vortigern, Calla races to piece together the mask’s puzzle while grappling with the revelation that her grandparents once helped seal the system, and that her pregnancy may be linked to the technology itself. Ancient science collides with modern greed in this high‑stakes techno‑thriller where history’s forgotten secrets might be humanity’s last hope.

Reader Praise

“This installment takes Calla Cress to a new level, combining archaeological intrigue with sci‑fi thrills.” 

“An exotic adventure with high‑stakes technology, surprising twists and a heroine whose personal journey is as compelling as the mystery.” – Advance review copy recipient

“The Pharaoh’s Mask cleverly blends ancient history and modern science. The seismic weapon concept felt chillingly plausible, and the Mediterranean locations were vivid.” – Early reviewer

“The resonance storyline added emotional depth to the trademark action and puzzles. Fans of technothrillers will be enthralled.” –  Early reviewer

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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