The spies at GCHQ in Cheltenham watch people in secret and solve puzzles every day. They include analysts, linguists, engineers, mathematicians, programmers and codebreakers. From codes and brainteasers to word riddles to language puzzles, there is something for everyone in this book of puzzles. Grab your friends and family and see how bringing together a mix of minds can solve anything.

Format: Paperback

216x153mmPages: 208