Adventures of the Northwoods Book #6

What secret could be hidden in the one-room schoolhouse at Spirit Lake? From the very first day, the spring term promises to be different from any other in the school's history. First, there's a new student who's older than the teacher. At six feet, three inches tall, he causes a stir with the school children—and the teacher! Next there's the strange sound that both Kate and Erik hear. And then there's Maybelle, Kate's eternal enemy! Can Kate live with courage in spite of being wrongly accused? A series of baffling clues seem to make no sense as she, Anders, and Erik search for answers. Is the only way to solve the mystery under the cover of darkness? Is the only way to solve the mystery under the cover of darkness? And if they solve the mystery will they really help someone?