Adventures in the Northwoods Vol. 9: Mystery of the Missing Map

In the dark of night Kate, Anders, and Erik travel to Michigan to meet Cousin Megan. As the train clickety-clacks into Copper Country, Kate overhears whispers about an easy steal and a plan to follow Anders and Erik. Then talk about James Mitchell, the man who owns the mansion where Megan's father is caretaker.
When Kate sees her cousin for the first time they look like identical twins. But Megan is blind, and her friend Willie makes matters worse. When Megan says, "I want to do everything I possibly can," Kate answers, "We'll do everything together." But can Kate and the boys stay ahead of the thieves and keep that promise?
Who hides coded messages outside the mansion? Who follows their search for the silver nuggets from Central Mine? And how can Megan, who sees more than many sighted persons, become a courageous part of the solution?
Recommended for ages 8-12.