The GCHQ Puzzle Book II: 2
by GCHQ
ISBN 13: 9780241365434
Format: Paperback (384 pages) Publisher: Michael Joseph Published: 18 Oct 2018
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Puzzles for Spies: The brand-new puzzle book from GCHQ, with a foreword from the Prince and Princess of Wales
by GCHQ,HRH The Prince of Wales,HRH The Princess of Wales
ISBN 13: 9780241579909
Format: Paperback (336 pages) Publisher: Puffin Published: 22 Sep 2022
The GCHQ Puzzle Book: Perfect for anyone who likes a good headscratcher
ISBN 13: 9781405970518
Format: Paperback (368 pages) Publisher: Penguin Published: 05 Sep 2024
The GCHQ Puzzle Book II: Solve more than 100 brilliant brainteasers
ISBN 13: 9781405970501
Format: paperback Publisher: Penguin