Silver Gravity Books

The Decrypter Series: Rose Sandy, Books 1–8 Ebook Bundle

Name: The Decrypter Series: Rose Sandy, Books 1–8 Ebook Bundle
Brand: Silver Gravity Books
SKU: The Calla Cress Decrypter Thriller Series 8 Ebook Bundle
Price: 99.99 GBP
Availability: InStock

£99.99 GBP

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Thriller & suspense, Action & adventure, Crime & mystery, and Suspense

Every Silver Gravity story centres women with agency.

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Step into the world of Calla Cress, a brilliant codebreaker drawn into deadly conspiracies, ancient secrets, cyber espionage, and global danger. This 8-book ebook bundle brings together the first thrillers in The Decrypter Series, perfect for readers who love intelligent heroines, fast-paced mystery, hidden history, and high-stakes adventure.

From stolen manuscripts and secret codes to lost cities, dangerous technology, and international plots, this binge-worthy series is packed with twists, suspense, and page-turning action.

Perfect for fans of Dan Brown, Steve Berry, and female-led action thrillers.

Book 1: A female-led cryptography thriller packed with secrets, codes and global danger

Book 2: A high-stakes cyber-espionage thriller where memory itself becomes a weapon

Book 3: A fast-paced political techno-thriller with ciphers, cyber war and hidden history

Book 4: A globe-trotting thriller about weaponised weather and deadly science

Book 5: A mathematical conspiracy thriller filled with ancient secrets and modern danger

Book 6: A treasure-code thriller where cryptography, history and espionage collide

Book 7: A lost-city thriller with ancient technology, global stakes and buried secrets

Book 8: A diamond conspiracy thriller with hidden power, desert mystery and silent warfare

1. The Decrypter: Secret of the Lost Manuscript
When a stolen manuscript pulls Calla Cress into a deadly mystery, she must decode secrets that could change her life forever.
2. The Decrypter and the Mind Hacker
A terrifying new threat turns memory and technology into weapons, and Calla must outthink an enemy who is always one step ahead.
3. The Decrypter: Digital Eyes Only
Called in to crack a high-level cipher, Calla uncovers a dangerous conspiracy hidden inside the digital heart of power.
4. The Decrypter: The Storm’s Eye
A secret island, missing scientists, and weaponised weather send Calla into a race against a threat that could reshape the world.
5. The Decrypter: The Pythagoras Clause
Ancient mathematics and modern danger collide as Calla follows a deadly trail of codes, patterns, and betrayal.
6. The Decrypter and the Beale Ciphers
A legendary treasure code leads Calla into a high-stakes hunt where the real secret is far more dangerous than gold.
7. The Decrypter and the Atlantis of the Sands
A lost desert civilisation, a coded manuscript, and a buried secret force Calla into one of her most dangerous missions yet.
8. The Decrypter and the Kingdom of Diamonds
When mysterious diamonds surface in the desert, Calla is drawn into a deadly conspiracy with the power to change humanity’s future.

About the Calla Cress Decrypter Series

The Calla Cress Decrypter Series is a female-led action-adventure techno-thriller series that blends global espionage, cryptography, and high-stakes discovery.

Often compared to a female James Bond crossed with Indiana Jones, the series follows Calla Cress, a brilliant cryptographer and museum curator whose expertise in ancient manuscripts and hidden systems draws her into international conspiracies. As intelligence agencies, criminal networks, and secret organisations collide, Calla is forced to navigate a world where knowledge is power — and decoding the truth can destabilise nations.

Each book stands alone while contributing to a larger arc of global intrigue, making the series perfect for readers who enjoy smart, fast-paced thrillers led by a woman who survives on intellect, courage, and moral clarity rather than brute force alone.

What Kind of Thriller Is This?

This book is best described as a female-led action-adventure techno-thriller.

It combines:

Technothriller elements (cryptography, data, hidden systems, modern intelligence warfare)
Espionage and conspiracy involving governments and shadow organisations
Action-adventure storytelling across global locations
A smart female protagonist whose intelligence drives the plot

If you enjoy thrillers where ideas are as dangerous as weapons — and where discovery triggers global consequences — this series is designed for you.

If You Love James Bond or Indiana Jones…

Readers often compare this series to James Bond and Indiana Jones, but with a modern, female-led twist.

Like James Bond, the story features global stakes, intelligence agencies, and dangerous conspiracies.
Like Indiana Jones, it revolves around ancient knowledge, hidden artefacts, and discoveries that reshape history.

What sets Calla Cress apart is that intelligence is the primary weapon. Codes replace gadgets. Pattern recognition replaces brute force. And the heroine’s strength lies in insight, scepticism, and resolve.

Story Tropes & Reader Appeal

Is This Book for You?

Do I Need to Read the Series in Order?

Each Calla Cress novel is written to stand alone, with its own central mystery and resolution.

However, reading the series in order allows you to follow Calla’s evolving relationships, growing influence, and the wider conspiracy arc that unfolds across the books. New readers can start here, while returning readers will uncover deeper connections.

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

About Rose Sandy

Rose Sandy is an independent author and publisher known for writing female-led action-adventure and techno-thriller fiction.

She is the creator of the Calla Cress Decrypter Series, a globe-spanning techno-thriller series often compared to a female James Bond crossed with Indiana Jones. Her work blends cryptography, global conspiracy, and high-stakes discovery, with a focus on intelligent heroines who survive through insight, courage, and moral clarity.

Rose Sandy’s stories are characterised by fast-paced plots, international settings, and the collision of history, technology, and power. Her fiction is written for readers who enjoy smart thrillers with real-world stakes and strong female protagonists at the centre of the action.