Train to be a secret agent in this exciting spy puzzle book!
Your secret mission, should you choose to accept it:
Rescue the kidnapped scientists who were on the brink of an invention that would change the world!
Put your spy skills to the test with four areas of puzzling challenges from hidden words and code-breaking to logic and observation puzzles, before you take on your top secret mission.
Hurry, this message will self-destruct in 3, 2, 1…
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