In the dark of night Kate, Anders, and Erik travel to Michigan to meet Cousin Megan. As the train c lickety-clacks into Copper Country, Kate overhears a whispered conversation about an easy steal, the man who owns the mansion where Megan’s father is caretaker, and a plan involving Anders and Erik. When Kate sees her cousin for the first time they’re like identical twins except for one thing--Megan is blind. As two people lurk in the darkness near the mansion, danger trails the four friends. Can they find the long-lost treasure map in time? Act with courage in spite of fear? Stay ahead of the thieves who also search for silver nuggets from Central Mine? And when rocks fall deep within a copper mine, what becomes the biggest treasure of all?
    
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