Ruby Sisson Library

Describes twenty different codes and ciphers, tells how to break them, and gives simple instruction for making encoding tools.

Discover more than 85 of the most important mathematical ideas, theorems, and proofs ever devised, and the great minds behind them, with this original, graphics-led book.

Joining the elite Bletchley Park codebreaking team during World War II, three women from very different walks of life uncover a spy's dangerous agenda years later against the backdrop of the royal wedding of Elizabeth and Philip. "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...

Again, brilliant Harvard professor Robert Langdon finds himself in a predicament that requires his vast knowledge of symbology and superior problem-solving skills to save the day. The setting, unlike other Robert Langdon novels, is stateside, and in Brown's hands Washington D.C. is as fascinating as Paris or Vatican City (note to the D.C. tourism board: get your "Lost Symbol" tour in order). And, as with other Dan Brown books, the pace is relentless,...

During World War II, as the Japanese were breaking American codes as quickly as they could be devised, a small group of Navajo Indian Marines provided their country with its only totally secure cryptogram. Recruited from the vast reaches of the Navajo Reservation in Arizona and New Mexico, from solitary and traditional lives, the young Navajo men who made up the code talkers were present at some of the Pacific Theatre?s bloodiest battles. They spoke...

The grandson of a legendary cryptographer must salvage a sunken Nazi submarine to uncover the clue to creating a "data haven," but his search reveals a massive conspiracy with its roots in WWII.

Kit Sutherland moves to Washington, DC, to work as a codebreaker at Arlington Hall, but when she stumbles onto a bloody homicide scene, she joins forces with other female codebreakers to find the person killing government girls.

"From spy missions to code breaking, this richly illustrated account of the covert operations of World War II takes readers behind the battle lines and deep into the undercover war effort that changed the course of history. From the authors who created Eyewitness to World War II and numerous other best-selling illustrated reference books, this is the shocking story behind the covert activity that shaped the outcome of one of the world's greatest conflicts--and...

Explains in simple terms how to encode and decode messages in various ciphers, describes coding machines, and gives formulas for invisible ink.