
Written by Franklin W. Dixon · Illustrated by Santy Gutiérrez
Part of the Hardy Boys Clue Book series
Can Frank and Joe uncover who sabotaged the Mud Run with frogs?
Frank and Joe are ready for Bayport Elementary's Mud Run, but chaos erupts when bullfrogs invade the course. With the town's annoyance over the muddy event, the brothers suspect sabotage. Can they solve the mystery of the frog-filled race before it's too late? Dive into this muddy adventure to find out!
Detective brothers Frank and Joe must solve a muddy mystery in the ninth book in the interactive Hardy Boys Clue Book series.
Bayport Elementary is hosting a Mud Run to celebrate spring! A particularly muddy part of the town’s park will be set aside for the race and Coach Lambert has even managed to make more mud by using the park’s hoses and shovels. Frank and Joe can’t wait to splash through the muck.
But on the day of the race, the runners are stopped in their tracks by croaking, blurping bullfrogs! Lots of people in the town had been annoyed that the park was being taken over by a bunch of muddy kids. Could someone have sabotaged the race with buckets of frogs?
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