The Clue in the Corn Maze

The Aldens find themselves right in the middle of an Iowa cornfield and a brand-new mystery! The farm where the children are visiting is famous for its wonderful corn maze, and every year visitors come to walk through the maze and enjoy the Corn King Days festival. But the maze is being vandalized at night, and the festival is in danger of being shut down. Can the children catch the culprit and save the festival?