Who is Charlie Doig from This House of Sky: Landscapes of a Western Mind and what is their importance?

Charlie Doig is the author's father. He, along with a woman who lived as his wife for many decades, raised a family in Montana. Late in their lives, they turned to the younger generation for some support, and found it. However easy or difficult it may have been, this man was forced to face his own illness and weakness after decades of having been a strong, vigorous rancher out in Montana 'big sky country'.