The Decrypter and The Eiger Mosaic: The Calla Cress Decrypter Thriller Series, Book 14 - Rose Sandy

Some mountains guard deadly secrets. Some secrets change the world.

When satellite images reveal a mysterious mosaic carved into the treacherous north face of the Eiger, cryptographer Calla Cress recognizes what others cannot—a complex cipher hidden in plain sight for over seventy years. But what begins as a historical puzzle quickly escalates into a desperate race that could reshape the balance of global power.

The Alpine Cipher, a legendary WWII encryption key, was thought lost forever. Now it's resurfacing, along with technology decades ahead of its time. As Calla's connection to the mountain grows strangely stronger with each discovery, she's plagued by visions and memories that aren't her own—visions involving her long-missing parents on these very slopes.

With a catastrophic winter storm approaching, Calla must confront her lifelong fear of heights and join forces with elite operative Nash Shields and tech genius Jack Kleve to scale the Eiger's deadly north face. But they aren't climbing alone. Dr. Ingrid Wolff, a brilliant cryptanalyst with powerful backers, leads a team of mercenaries up the mountain with orders to secure the cipher by any means necessary.

As they ascend higher, Calla uncovers a stunning truth: the Alpine Cipher isn't just about buried wartime secrets—it's about the future of humanity itself. And somehow, her own genetic heritage lies at the heart of its mystery.

What her parents died protecting, she now must find. What others would kill to possess, she must understand. What was carved in stone and ice, she alone can decode.

From the breathtaking peaks of the Swiss Alps to hidden WWII bunkers beneath the ice, EIGER MOSAIC delivers heart-stopping action, ancient mysteries, and cutting-edge science in an explosive cocktail that will keep you turning pages late into the night. Perfect for fans of James Rollins, Steve Berry, and Dan Brown.

The truth is buried deep. The climb could be deadly. The cipher will change everything.

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