One missing person, one code, tens of thousands of possible combinations. Do you have what it takes to crack the case in this elimination-style puzzle book? The clock is ticking...A world-famous cryptographer has vanished without a trace. She spent years creating an unbreakable security system, and now, in a cruel twist of irony, unlocking it may be the only way to find her. Then investigators discover a secret file marked "X," containing a list of names and 12 cryptic clues. Somewhere among tens of thousands of possible combinations is the code that unlocks the truth. There's just one problem: every clue tells you what the answer isn't. Use logic and deduction to eliminate impossible combinations, narrow the field, and uncover the single code that fits every piece of evidence. With tens of thousands of possible codes and only 500 words of evidence, every clue matters. Eliminate tens of thousands of possible code combinationsSolve 12 cryptic clues using logic and deductionWork backward as each clue reveals what the answer isn't Follow an immersive missing-person mystery as the evidence unfoldsEnjoy hours of challenging, screen-free puzzle solving Follow the clues, crack the case, and reveal the secret cipher before it's lost forever
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