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The Three Investigators is an American juvenile detective book series first published as "Alfred Hitchcock and the Three Investigators". It was created by Robert Arthur Jr. The Three Investigators books have always been very popular in Germany. They are known there as Die drei ??? (Die drei Fragezeichen, meaning "The Three Question Marks"). For the German series please refer to [url=https://bookbrainz.org/series/a9b03fe8-0d3c-4b3c-8524-a6f4c50d757b]Die drei ???[url]

The Three Investigators is an American juvenile detective book series first published as "Alfred Hitchcock and the Three Investigators". It was created by Robert Arthur Jr. The Three Investigators books have always been very popular in Germany. They are known there as Die drei ??? (Die drei Fragezeichen, meaning "The Three Question Marks"). For the German series please refer to [url=https://bookbrainz.org/series/a9b03fe8-0d3c-4b3c-8524-a6f4c50d757b]Die drei ???[/url]