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The Turing Tests: Expert IQ Puzzles
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The GCHQ Puzzle Book
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Sherlock Holmes Puzzles: Math and Logic Games
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Boost Your IQ: Tips and Techniques for a Sharper Mind
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Murdle: Volume 1
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Stay Smart for Brain Health
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Anti-Stress Puzzles
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Secret Agent Brainteasers
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Brain Workout: Tips and Techniques to Train Your Mind
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The Mysterious Mansion
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The Escape Book 2
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Sherlock Holmes Puzzles: Code Breakers
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Edgar Allan Poe Puzzles
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Sleuth & Solve
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Sherlock Holmes Puzzles: Lateral Brain Teasers
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