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An addictive and exciting puzzle book based on 500 years of British espionage history, drawn direct from the catalogues of The National Archives
After Murdle ...
One crime to solve. Over 70 killer conundrums to piece together the clues. A classic murder mystery game in a puzzle book. The first book ...
The brain-busting follow up from the UK's finest code-breakers and puzzle solvers at GCHQ, now available in a handy paperback
GCHQ are back with ...
