When the top secret training facility on the grounds of A.T.A.C. headquarters is set-upon by Poppa Noir's anti-justice organization, the Hardy Boys must battle their opposite numbers, the Sisters Noir, to free the captured adult A.T.A.C. agents.
Series:
The Hardy Boys undercover brothers ; #15 Lobdell, Scott. Hardy Boys undercover brothers (Papercutz (Firm)) ; #15.
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