Franklin W. Dixon 
Training for Trouble [EPUB ebook] 

JUDO…FENCING…ARCHERY…BIATHLON…SOMEONE WANTS TO WINAT ANY COST!The combat sports training facility has just opened in Bayport, and the Hardys are on hand to check it out. They can practice judo, fencing, archery, and biathlon, and meet aspiring athletes from all over.But good times turn to bad sportsmanship when Joes girlfriend, Iola, gets a nasty electrical shock during a fencing workout. Then someone decides to use Frank for target practice on the archery range. Now the Hardys are wondering if the events are more than accidents. How far will world-class competitors go to win?