cryptography

Looks at eight codes and ciphers throughout history that could not be solved.

"Looks at the secret war on a global basis, bringing together the British, American, German, Russian and Japanese histories [and] examines the espionage and intelligence machines of all sides in World War II, and the impact of spies, code-breakers and partisan operations on events"--Provided by publisher.

"Lucas's father has recently died in Afghanistan, and to help him cope, his grandmother sends him to Camp Kawani, a camp for kids who have lost a parent. While there, he hears about the local legend of Thomas Jefferson Beale. Beale supposedly hid a hoard of gold in the mountains 200 years before. The location is encrypted in a set of codes no one has ever been able to decipher. When Lucas and his newfound friends decide to track down the treasure, they embark on a mission that could be too dangerous to survive."--Provided by publisher.

Amy and Dan Cahill are in the lead to find thirty-nine clues that safeguard a great power, and are in possession of a coded sheet of Mozart's music that will help them find the next clue while their relatives follow in close pursuit. Does not include game cards.

Siblings Amy and Dan Cahill continue their global search for the clues that will unlock the Cahill family's secret power while also working to evade Irina Spasky.

"Amidst a complicated history of mistreatment by and distrust of the American government, the Navajo people--especially code talkers--helped the Allies win World War II"--Provided by publisher.

"A trip to a museum to learn about ancient Egypt turns into a new case for the Code Busters when they discover that someone may be stealing artifacts and replacing them with cunning forgeries"--Provided by publisher.

During a class trip to Washington, D.C., the Code Busters have many opportunities to hone their sleuthing skills as they explore the International Spy Museum, the White House, and more, but when a classmate goes missing, a mysterious figure in a trench coat may be the key to solving the case.

World War I is often viewed as a war fought by armies of millions living and fighting in trenches, aided by brutal machinery that cost the lives of many. But behind all of this an intellectual war was also being fought between engineers, chemists, code-breakers, physicists, doctors, mathematicians, and intelligence gatherers. This hidden war was to make a positive and lasting contribution to how war was conducted on land, at sea, and in the air, and most importantly, life at home.