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Can you crack the toughest codes of the 20th century?

Imperial War Museums have created a cryptographic challenge worthy of the finest minds of Bletchley Park and Room 40. This is your chance to prove that you have the code-breaking skills to rank among them.

There are hundreds of head-scratching ciphers included in Code-Breaking Puzzles certain to keep you entertained for hours, alongside 20th century military history puzzles and crosswords perfect for the armchair general. For those who need a helping hand, the book also includes a brief history of cryptography, along with tips and tricks to help you make the connections you need to decrypt and solve the puzzles.

Whether you are a military history buff or a lateral-thinking lover, good luck: your country needs you!