"Trust no one. Justine Byrne can't trust the people working beside her. She can't trust the women who live down the hall. She can't even trust the man in front of her, and she just might love him. Inside the walls of Arlington Hall, a former women's college in Virginia that has been taken over by the United States Army, hundreds of men and women sit, bent over stacks of paper. Pencils in hand, they labor to decode countless pieces of communication...

"Jacobite exile Mary Dundas is filled with longing--for freedom, for adventure, for the family she lost. When fate opens the door, Mary dares to set her foot on a path far more surprising and dangerous than she ever could have dreamed. As Mary's gripping tale of rebellion and betrayal is revealed to [amateur codebreaker Sara Thomas, she] faces events in her own life that require letting go of everything she thought she knew--about herself, about loyalty,...

"From the time she was a young girl, Luisa Voekler has loved solving puzzles and cracking codes. Brilliant and logical, she's expected to quickly climb the career ladder at the CIA. But while her coworkers have moved on to thrilling Cold War assignments-especially in the exhilarating era of the late 1980s-Luisa's work remains stuck in the past decoding messages from World War II. Journalist Haris Voekler grew up a proud East Berliner. But as his eyes...

By following the instructions in the coded message, Tim finds his birthday present.

In 2003, the first human genome was sequenced. But the secrets it held were never revealed. The truth was discovered thirty years ago, almost by accident. Dr. Paul Kraus had spent his entire career searching for what he called humanity's lost tribes--human ancestors who had gone extinct. When Kraus compared the DNA samples of the lost tribes with our own, he found a pattern of changes: a code. At the time, the technology didn't exist to unravel what...

Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair. Spies report that Amy and Dan seem to be tracking the life of one of the most powerful fighters the world has ever known. If this fearsome warrior was a Cahill, his secrets are sure to be well-guarded.

It is March 1943 and the War hangs in the balance . . . At Bletchley Park Tom Jericho, a brilliant young codebreaker, is facing a double nightmare. The Germans have unaccountably changed their U-boat Enigma code, threatening a massive Allied defeat. As suspicion grows that there may be a spy inside Bletchley, and Jericho is suspected, his girlfriend, the beautiful and mysterious Claire Romilly, suddenly disappears. With the help of Claire's best friend,...

As the race to find the 39 Clues builds to its explosive finish, Amy and Dan must explore an ancient culture and steal a Clue guarded by thousands of the world's best-trained soldiers. It's the most dangerous Clue search yet ... and it may mean the end for Amy and Dan.

A thrilling romantic suspense wrapped in mystery and intrigue from acclaimed author Juno Rushdan. The countdown has begun and time is running out—the final hour is upon them...

Fearsome Gray Box operative Gideon Stone is devoted to his work and his team. He's never given anyone reason to doubt his loyalty...until he's tasked with investigating Willow Harper, a beguiling cryptologist suspected of selling deadly bio-agents

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Jax and Ethan must decode an ancient Greek cipher to uncover the location of two magical urns before the urns are used to remove all faith and love from the world.