Silver Gravity Books

Against the World: The Nash Shields Thrillers, Ebook 4 - Rose Sandy

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

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The Explosive Fourth Chapter in the Nash Shields Series

When loyalty becomes a liability, one man must stand against the world.

Elite operative Nash Shields has survived countless missions for KJ20 Ops, but nothing has prepared him for the most dangerous decision of his career—walking away. As he uncovers disturbing truths about his superiors' methods and motives, Nash is forced to choose between duty and conscience.

When a shadowy organization targets Calla, the woman who's captured his heart, the stakes become lethally personal. They want her for her exceptional code-breaking abilities and a secret she carries and no one should possess.

Now fugitives, Nash and Calla take refuge in his remote Colorado mountain hideaway. But as their pursuers close in, they realize the sanctuary they sought might become their trap. With enemies at every turn and nowhere left to run, Nash must rely on his lethal skills and unwavering resolve to protect the woman he loves and confront a conspiracy that threatens everything he's ever fought for.

"Against the World delivers white-knuckle suspense and exciting action from the first page to the last. Nash Shields proves once again why he's the most compelling hero in modern thrillers." — Reader

Perfect for fans of Jack Reacher, Jason Bourne, and Orphan X.

ABOUT THE SERIES

About the Series

The story before the Decrypter. The action before the chaos. The agent behind the missions.

The Nash Shields Thrillers follow Nash Shields — a fearless, relentless Marine-turned-NSA agent recruited into KJ20-Ops, a black-ops unit tasked with retrieving technologies that are far too dangerous to land on the open market. Long before Calla Cress was pulled into global conspiracies, Nash was already running covert ops, facing off with experimental science, and shutting down enemies with international reach.

Each book delivers high-velocity action, cutting-edge tech, and global stakes — with a growing emotional thread as Nash’s missions intersect with Calla and the wider Decrypter universe. By Book 4, the mission stops being “recover this tech” and becomes “protect the woman everyone wants to weaponise.”

Perfect for readers who love The Decrypter Series and want to see the black-ops side of that world.

SERIES READING ORDER

Series Reading Order

Helium Heist (The Nash Shields Thrillers – Book 1)

Nash races to secure Helium-3 — a rare isotope with the power to change the global energy game — and uncovers a conspiracy that reaches far beyond a single heist.
Fallen Game (Book 2)

Assigned to protect a researcher working on a breakthrough in longevity science, Nash must stay ahead of rival players who will kill to own the tech.
Project Horizon (Book 3)

Abandoned blueprints for parallel-universe infiltration surface. Nash is sent to retrieve the volatile tech before it sparks a global incident.

4. Against the World (Book 4)

Now on the run with Calla, Nash faces enemies who want to exploit her rare gifts. The mission shifts from extraction… to protection.

READ A SAMPLE

Book in production.

Meet the Author

Rose Sandy is the international bestselling author of The Decrypter Series, known for adrenaline-fuelled thrillers where espionage, technology, and hidden histories collide. Her stories travel the world, blend real-world science with page-turning suspense, and centre capable protagonists caught in global power plays.

With the Nash Shields Thrillers, she expands the same universe — showing the covert operations, experimental tech, and black-ops missions running alongside Calla Cress’s adventures. If you love fast-paced action, smart science, and interconnected storyworlds, this series sits right beside her flagship novels.

Tropes You'll Love

Elite/black-ops operative (Marine → NSA → KJ20-Ops)
“Too dangerous for normal agencies” tech-recovery missions
Government/agency secrets and “who can we trust?” vibes
Direct crossover with Calla Cress / The Decrypter (same universe, earlier timeline)
Protector/bodyguard energy in the later book(s)
International thriller settings (UK, Europe, remote hideouts)
High-concept science and plausible future tech

• • Recurring team/ops characters — that “shared universe” feel

Audio Book Sample

Book in production.

Other Book Details

nash shields thrillers, rose sandy thrillers, decrypter prequel series, tech espionage thriller, black ops action thriller, female-forward spy fiction, clean energy conspiracy, sci-fi action adventure, silver gravity books thrillers, international suspense series