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.

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.

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.

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

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.

Genres & Themes

Genres:

• Action-Adventure Thriller
• Techno-Thriller
• Espionage & Intelligence Thriller

Themes:

• Knowledge as power
• Truth versus control
• Women in high-stakes intelligence spaces
• History colliding with modern technology
• Moral courage under global pressure