Absaroka by Joan Bochmann
Absaroka: where the anguish of a soldier meets the land of the Crow, published in 2006 is the story of Matt, a troubled young man returning from the Vietnam conflict to seek refuge at the family's ranch in northern Wyoming, only to find his beloved home devoid of cattle, his mother gone, and his father only a shell of his former self. He soon learns that anthrax wiped out the livestock and his father mortgaged the ranch to fund his mother's cancer treatment. The owner of the mortgage is his high school nemesis and is determined to sell the ranch for big bucks to a corporation with mining interests. How is Matt, who is already suffering PTSD and grief for his mother, going to find the strength—and the money—to get his ranch back?