What Is The Plot Of The Book 'Martial Law'?

The book 'Martial Law' is part of the series of Hardy Boys, the undercover brother series. This is the ninth book in this series written by the author Franklin w. Dixons who is quite popular because of all the Hardy Boys books which was first released in the year 1927.
In the undercover brother series, the boys are part of The American teens against crime organization and thus continue their amateur detective work.

In the book Martial law The American teens against crime organization or the ATAC send their two best detectives, the Hardy brothers to investigate the problems in a martial arts centre which is located at the Phoenix. There have been two accidents of two students training and Frank and Joe Hardy try their best to search for any clues that show some connection between these so-called accidents.

For all those who are new to the Hardy Boys, these books are always mystery incorporated books and have since ages been a favourite and a best seller among children.