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Ilan and Chloe are experienced players with many successful quests behind them. But this time, they and six other participants will face Paranoia, a semi-mystical game that is hard to get into. The pursuit of the €300,000 prize money will take place in an abandoned hospital for the mentally ill. Pretty soon, the game space will turn into a horrific reality. The full picture will remain unclear until the very last fragment. Well, that's what a puzzle is for. A fascinating, eerie, solid read with a completely unexpected ending from the acknowledged master of the thriller genre, Frank Tillier.