UK Spy Agency GCHQ's New Puzzle Book: Can You Crack It?
16:38 GMT 17.10.2016 (Updated: 11:36 GMT 13.06.2020)
© Photo : PIxabayPuzzle
© Photo : PIxabay
Normally when we think about a puzzle book what springs to mind is simple crosswords or brain teasers. That's changed now as GCHQ, the UK government intelligence agency, has just released a book of codes that everyone's invited to break.