Every Silver Gravity story centres women with agency.
Three Cryptic Codes. One Fearless Heroine. Infinite Danger.
If you love globe-trotting thrillers packed with unbreakable ciphers, high-stakes espionage, and a brilliant heroine who outsmarts everyone in the room, this is where the adventure begins.
Books 1, 2, and 3 in the internationally bestselling Calla Cress Decrypter Thriller Series by Rose Sandy, collected in one unmissable ebook bundle. Meet Calla Cress, the British Museum's most brilliant curator and the government's most closely guarded secret. Once you start, you will not stop.
Book 1: Secret of the Lost Manuscript
A priceless manuscript vanishes from a Berlin vault. The cipher it contains has never been broken. And the only person who can decode it is a woman who does not yet know who she really is. When Calla is pulled into a race across Europe to recover the manuscript before it falls into the wrong hands, she uncovers something far more dangerous than stolen history: the truth about herself.
Locations: Berlin, across Europe
Book 2: The Mind Hacker
She chose not to kill him. Now the world is paying the price. The world's brightest minds are falling into comas. Governments are being brought to their knees by cyber attacks of surgical precision. And the man responsible is doing it all from a high-security prison cell. Pulled back into the field after an explosion destroys her Colorado safe house, Calla finds herself hunted by a powerful organisation demanding answers about a missing MI6 agent. Racing across continents with NSA advisor Nash Shields and tech entrepreneur Jack Kleve, she must confront a weapon unlike any other, one that turns the human mind against itself.
Locations: Colorado, across continents
Book 3: Digital Eyes Only
The NSA's most dangerous secrets are for sale. Only one person can stop the auction. When Calla is summoned to Downing Street to decrypt a classified communication, what begins as a contained security crisis quickly unravels into something far darker. A device stolen from the NSA's most restricted vault contains codes for technologies the world is not ready for, and it is about to be sold to the highest bidder on the darknet. The trail leads from the corridors of Westminster to the sun-bleached fortresses of Malta, from Monte Carlo's gilded rooms to a Bavarian castle hiding secrets beneath its foundations.
Locations: London, Malta, Monte Carlo, Bavaria
Fans of this series love:
- Race against time
- Ancient secrets with modern consequences
- Globe-trotting adventure across iconic locations
- Ciphers, puzzles and codebreaking
- Secret societies and shadowy enemies
- High-tech espionage meets historical conspiracy
- An unstoppable, brilliant heroine
- Betrayal, found family and reluctant allies
- World-at-stake stakes
Perfect for readers who love:
Dan Brown, Steve Berry, James Rollins, Scott Mariani, Ernest Dempsey, Clive Cussler, female-led action thrillers, cryptographic mystery, techno-thriller
Bundle and Save, get all three ebooks in one purchase and dive straight into Calla's world from the very beginning. No waiting. No gaps. Just pure, unputdownable thriller fiction.
Add to cart and start reading today.
For the physical book bundles, check the Bundles drop-down menu.
