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The Cypher Files is unlike any book you've experienced before. In this unique interactive game, you will solve puzzles on every page, and obtain keys to move forward by submitting answers online. To solve each puzzle, you'll need to think outside the box. You are an agent of CY.P.H.E.R., the secret international agency working on 'unsolvable' code-based cases. With fellow agents missing left and right and a mysterious foe bearing down on you, the clock is ticking to crack the codes and avoid a certain fate.