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Index
Cover
Endpaper
Title Page
Contents
Dedication
Preface by HRH The Duchess of Cambridge
Foreword by Director GCHQ
Solving Puzzles for Fun at GCHQ
Introduction to the Puzzles
Section 1: Starter Puzzles
Section 2: The Puzzles
First Colour Section
Second Colour Section
Third Colour Section
Kristmas Kwiz Challenge
Hints
Explanation of Puzzle Types
Clues to the Starter Puzzles
Answers
Appendix
Picture Credits
Credits
Endpaper
Follow Penguin
Copyright Page
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