Examines a number of different ways of writing secret messages, including using invisible ink and a variety of ciphers. Provides suggestions and aids for code-breaking.

Recruited by the U.S. Army and Navy from small towns and elite colleges, more than ten thousand women served as codebreakers during World War II. While their brothers and boyfriends took up arms, these women moved to Washington and learned the meticulous work of code-breaking. Their efforts shortened the war, saved countless lives, and gave them access to careers previously denied to them.

In 1940, almost a year after the outbreak of the Second World War, Allied radio operators at an interception station in South London began picking up messages in a strange new code. Traffic in this new encryption increased dramatically and Bletchley Park codebreakers worked furiously to decipher the code that held the key to the secrets of Nazi high command. The codebreakers used science, maths, innovation and improvisation to invent an entirely new...

Recounts how the events of World War I led to major developments in the fields of aviation, cryptography, engineering, chemistry, medicine, and propaganda, and profiles the major figures involved, principally in Britain.

In 1916, at the height of World War I, brilliant Shakespeare expert Elizebeth Smith went to work for an eccentric tycoon on his estate outside Chicago. The tycoon had close ties to the U.S. government, and he soon asked Elizebeth to apply her language skills to an exciting new venture: code-breaking. There she met the man who would become her husband, groundbreaking cryptologist William Friedman. Though she and Friedman are in many ways the "Adam...

"An inspiring graphic novel about Elizebeth Friedman, a codebreaking pioneer who changed the course of World War II. Nazi spy rings! No-good gangsters! Shakespearian lies! Discover the courageous woman who cracked all these cases and more-with only a pencil and paper. The youngest of ten siblings, Elizebeth Friedman stood out from an early age with brilliant language skills and a passion for English literature. Eventually, these talents led to a new...

An examination of one of the most important yet underexplored aspects of World War II--intelligence--shows how espionage successes and failures by the United States, Britain, Russia, Germany, and Japan influenced the course of the war and its final outcome.

The story of the women of Bletchley Park, Britain's top secret code-breaking school, is told through exclusive interviews with the women who served their country, and the impact that their service had on the rest of their lives. Based on extensive interviews conducted specifically for this book, Tessa Dunlop tells the story of the Bletchley Girls through the lives of 15 women who were all selected to work in Britain's most secret World War II organization...