Tells the stories of ninety-five situations in which code and hidden messages have been used throughout history.

A collection of four all-new strange stories from the sleepy town of Gravity Falls in one original graphic novel. Written by Alex Hirsch. Illustrated by Asaf Ha

'This book is a page-turner - endlessly fascinating, totally compelling, and incredibly informative. I could not put it down.''rory Freedman, Co-author of New Y

To defeat your enemies you must know them well. In wartime, however, enemy codemakers make that task much more difficult. If you cannot break their codes and re

Students Kayla and Tim visit the International Spy Museum for a class field trip. When Kayla notices something strange, the two children find that all is not wh