1940. As England prepares to fight the Nazis, three very different women answer the call to mysterious country estate Bletchley Park, where the best minds in Britain train to break German military codes. Vivacious debutante Osla is the girl who has everything, but she burns to prove herself as more than a society girl. Imperious self-made Mab, works the legendary codebreaking machines as she conceals old wounds. Both Osla and Mab are quick to see...

In 1916, a young Quaker schoolteacher and poetry scholar named Elizebeth Smith was hired by an eccentric tycoon to find the secret messages he believed were embedded in Shakespeare's plays. She moved to the tycoon's lavish estate outside of Chicago expecting to spend her days poring through old books. But the rich man's close ties to the U.S. government, and the urgencies of war, quickly transformed Elizebeth's mission. She soon learned to apply her...

"As a boy, Chester Nez was taught his native language and culture were useless, but he was later called on to use his Navajo language to help create an unbreakable military code during WWII"--

"1943. As war in the Pacific rages on, Isabel Cooper and her codebreaker colleagues huddle in "the dungeon" at Station HYPO in Pearl Harbor, deciphering secrets plucked from the airwaves in a race to bring down the enemy. Isabel has only one wish: to avenge her brother's death. But she soon finds life has other plans when she meets his best friend, a hotshot pilot with secrets of his own. 1965. Fledgling journalist Lu Freitas comes home to Hawai'i...

INTERNATIONAL BESTSELLER
Go behind the scenes of Bletchley Park, where everyday men and women risked everything for Queen and Country. 
A remarkable look at day-to-day life of the codebreakers whose clandestine efforts helped win World War II
Bletchley Park looked like any other sprawling country estate. In reality, however, it was the top-secret headquarters of Britain’s Government Code and Cypher School—and the site...

"By the time the United States joined the Second World War in 1941, the fight against Nazi and Axis powers had already been under way for two years. In order to win the war and protect its soldiers, the US Marines recruited twenty-nine Navajo men to create a secret code that could be used to send military messages quickly and safely across battlefields. Author James Buckley Jr. explains how these brave and intelligent men developed their amazing code,...

In this picture book biography, young readers will learn all about Elizebeth Friedman (1892-1980), a brilliant American code breaker who smashed Nazi spy rings, took down gangsters, and created the CIA's first cryptology unit. Her story came to light when her secret papers were finally declassified in 2015. From thwarting notorious rumrunners with only paper and pencil to "counter-spying into the minds and activities of" Nazis, Elizebeth held a pivotal...

"This new, revised edition of The Bitcoin Guidebook has the most up-to-date info and recommended approaches for anyone who doesn't want to be left behind in the next technological revolution. It is an easy-to-read, easy-to-understand guide that explains everything the reader needs to know about how Bitcoin and other digital currencies work, what they can be used for, and how they will shape our society in the future" --amazon.com.

"Discusses different methods for creating secret codes"--Provided by publisher.

If you've ever made a secure purchase with your credit card over the Internet, then you have seen cryptography, or "crypto", in action. From Stephen Levy-the author who made "hackers" a household word-comes this account of a revolution that is already affecting every citizen in the twenty-first century. Crypto tells the inside story of how a group of "crypto rebels"-nerds and visionaries turned freedom fighters-teamed up with corporate interests to...