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?
 
Best-selling novels set in the early 1900's in Minnesota, northwest Wisconsin, and Michigan, these compelling, historically accurate stories attract reluctant, average, and gifted readers. Both boys and girls identify with characters who face danger and mystery while learning to deal with peer pressure, family relationships, and the need for unconditional love and forgiveness.
 
"In her Northwoods Adventures, Lois Walfrid Johnson blends regional history, positive values, and engaging characters with mystery to boot. The same blend occurs in the Riverboat series, making the Underground Railroad very real to young readers. Our family gathered around and read each of her books aloud."
— Harvey Stower, Mayor, Amery, Wisconsin
Former State Representative, Wisconsin State Assembly