The Three Investigators and the Cranky Millionaire

Under highly mysterious circumstances, the city's well-known millionaire Pilcher disappears at the engagement party of his daughter Marilyn. What is the story behind the mysterious "Bishop's Book" that is soon demanded by the blackmailers? And how are the secret messages in Pilcher's private computer to be interpreted? A tough nut to crack for the three clever young detectives, who, in addition to their dangerous investigative work, also have to act as bodyguards around the clock. Marilyn doesn't want to be alone for a minute, as the gloomy house also seems to be haunted at night...

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