What is the next letter in the sequence

M, V, E, M, J, S, U, ?

Delve into the top-secret intelligence and security agency that is GCHQ. With code-breakers having kept our country safe, from the Bletchley Park breakthroughs of WWII to cyber-attacks in the modern day.

Even as a leisure activity, staff love a good puzzle.

Opening their archives of decades' worth of codes, puzzles and challenges, this book gives everyone a chance to try out whether you are worthy of the GCHQ crew.

Also including tips on how to get into the mindset of a code-breaker and a competition section searching for Britain's smartest puzzler.

Good luck!

Product Information:
• ISBN: 9780718185541
• Author: Penguin Books
• Publisher: Penguin Books
• Format: Paperback
• Pages: 336
• Dimensions: 23 x 15 x 4cm