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The Four-Headed Dragon is the 69th title of the Hardy Boys series, written by Franklin W. Dixon.
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The Sting of the Scorpion is Volume 58 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book was written for the Stratemeyer Syndicate by James D. Lawrence in 1979. The first four printings contained a plug for Night Of The Werewolf, but this was removed after the court case …
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