The Reckoner: The Reckoner Series, Marin Cyrus, Book 1

Romance, Family, Travel, Thriller & suspense, Suspense, and Crime & mystery

Every Silver Gravity story centres women with agency.

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He had it all. Until one scandal destroyed everything.

Framed for an assassination and shattered by loss, tech icon Job Mercer goes off-grid with Cassandra Themis, a fearless ex-intelligence operative who can prove the footage that damned him was faked. From London to Geneva, they race a surveillance cabal to expose the truth—and discover a slow-burn connection worth risking everything for. Dust and Ashes is a smart, twist-rich conspiracy thriller.

Framed by doctored footage, he’s out of options, until she walks in with proof and a plan dangerous enough to work

When a high-profile assassination is pinned on the AI tools built by London tech icon Job Mercer, his empire implodes—and a “car accident” steals the rest. Six months later, he’s a pariah awaiting a closed-door inquiry designed to bury him. Enter Cassandra Themis: Greek-Iranian ex-intelligence operative turned investigative journalist, famous for exposing deep-state corruption. Her evidence is simple and terrifying—the footage that damned Job was expertly altered, and the people behind it aren’t done.

Forced off-grid, Job and Cassandra become fugitives and partners, navigating international cities, private security tails, and a surveillance cabal led by the charismatic Dorian Voss. From shadow archives in Geneva to a high-risk pull in Canary Wharf, they gather proof that could topple a global machine—and discover a slow-burn connection neither expected. The Reckoner delivers a binge-worthy blend of conspiracy thriller and romantic suspense—perfect for fans of Anatomy of a Scandal, The Night Agent, and The Undoing.

You’ll love this if you enjoy:

• Fearless women who lead the charge

• Morally complex heroes seeking redemption

• Twisty plots with smart, timely stakes (AI, media power, corruption)

• Urban, international settings (London, Geneva, Paris)

• Found-family alliances and a redemption arc with heart

Content notes (light): off-page family loss, political violence, surveillance-state intimidation, brief combat injuries.

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.