Hardy Boys: Undercover Brothers #9 - Martial Law (P)

Hardy Boys: Undercover Brothers #9 – Martial Law (P) | A Martial Arts Mystery Mission

ATAC agents Frank and Joe Hardy are sent undercover to the Rising Phoenix Martial Arts Center after two students suffer suspicious injuries—one mysteriously collapses, and the other is severely beaten. Are these incidents accidents or part of something more sinister?

Set in Holtsville, just south of Bayport, this fast-paced mystery forces the Hardy Boys to dig deep into the world of martial arts, where anyone—from the students to the sensei—could be hiding secrets.

Ideal for readers aged 8 and above, Martial Law delivers action, danger, and detective work in the signature Hardy Boys style.

Keywords: Hardy Boys Undercover Brothers Martial Law, Hardy Boys #9, Franklin W. Dixon books, martial arts mystery book, detective series for kids, mystery books for 8+ years, ATAC missions, children’s action adventure series.