![NCSC UK on Twitter: "Our challenge to you this #WorldBookDay... How fast can you complete puzzle 221 on page 134 of the @GCHQ Puzzle Book II? Our best time will obviously be NCSC UK on Twitter: "Our challenge to you this #WorldBookDay... How fast can you complete puzzle 221 on page 134 of the @GCHQ Puzzle Book II? Our best time will obviously be](https://pbs.twimg.com/media/ESVZbFSWoAEgRB9.jpg)
NCSC UK on Twitter: "Our challenge to you this #WorldBookDay... How fast can you complete puzzle 221 on page 134 of the @GCHQ Puzzle Book II? Our best time will obviously be
![Puzzles for Spies: The brand-new puzzle book from GCHQ, with a foreword from the Prince and Princess of Wales : GCHQ, Wales, HRH The Prince of, Wales, HRH The Princess of: Amazon.co.uk: Puzzles for Spies: The brand-new puzzle book from GCHQ, with a foreword from the Prince and Princess of Wales : GCHQ, Wales, HRH The Prince of, Wales, HRH The Princess of: Amazon.co.uk:](https://m.media-amazon.com/images/I/71D0CXK0XvL.jpg)
Puzzles for Spies: The brand-new puzzle book from GCHQ, with a foreword from the Prince and Princess of Wales : GCHQ, Wales, HRH The Prince of, Wales, HRH The Princess of: Amazon.co.uk:
![Puzzles for Spies: The brand-new puzzle book from GCHQ, with a foreword from the Prince and Princess of Wales : GCHQ, Wales, HRH The Prince of, Wales, HRH The Princess of: Amazon.co.uk: Puzzles for Spies: The brand-new puzzle book from GCHQ, with a foreword from the Prince and Princess of Wales : GCHQ, Wales, HRH The Prince of, Wales, HRH The Princess of: Amazon.co.uk:](https://m.media-amazon.com/images/S/aplus-media-library-service-media/fe2297fb-8d66-458d-91e4-6071c16f49a7.__CR0,0,970,300_PT0_SX970_V1___.jpg)
Puzzles for Spies: The brand-new puzzle book from GCHQ, with a foreword from the Prince and Princess of Wales : GCHQ, Wales, HRH The Prince of, Wales, HRH The Princess of: Amazon.co.uk:
![Puzzles for Spies: The brand-new puzzle book from GCHQ, with a foreword from the Prince and Princess of Wales : GCHQ, Wales, HRH The Prince of, Wales, HRH The Princess of: Amazon.co.uk: Puzzles for Spies: The brand-new puzzle book from GCHQ, with a foreword from the Prince and Princess of Wales : GCHQ, Wales, HRH The Prince of, Wales, HRH The Princess of: Amazon.co.uk:](https://m.media-amazon.com/images/I/41H91GdJPfL._SX352_BO1,204,203,200_.jpg)