Woman of the Boundry Waters by Justine Kerfoot. 
This is a story of a woman who came into the Gunflint Trail area to stay and to live in the mid to late 1920's and stayed for the next 60 years.
Before the roads were made, the lodges, phones she was here, watching all the advances come into play.
A true wilderness story of the early days, and full of history in the making.
I really enjoyed this book and felt at the end when the regulations started to happen for protection of the canoe parks, she was caught up in the old and the new era.