Gchq: 2 books

The PERFECT GIFT for anyone who loves a good head-scratcher - the original official puzzle book for the GCHQ team . . . Would GCHQ recruit you? Pit your wits against the people who cracked Enigma in the official puzzle book from Britain's secretive intelligence organisation . . . -------------------------------- Odd...

The GCHQ team's long-awaited second puzzle book - full of both harder and easier brain teasers - is the PERFECT GIFT for anyone who loves a challenge. 'Fiendishly tricky' Daily Mail With their first bestselling book, The GCHQ Puzzle Book, the UK's intelligence and security experts tested...