Frank and Joe Hardy continue their undercover investigation of Gamma Theta Theta, a mysterious-turned-dangerous fraternity at an all-boys New England boarding school. The headmaster's meddlesome, trouble-making daughter is in danger, and it seems like the fraternity members - and even some of the faculty - will stop at nothing to protect their secrets.
This is Book 32 in the Hardy Boys Series. See all Hardy Boys books here.
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