"Montana 1948" is a novel by Larry Watson that explores themes of morality, family loyalty, and the loss of innocence. Set in the small town of Bentrock, Montana, the story follows the life of a young boy named David Hayden as he navigates a complex situation involving his family and their secrets. The plot centers around David's father, Wes Hayden, who is the town sheriff, and his brother, Gail, a doctor with a troubling past. When a crime involving Gail comes to light, Wes faces a moral dilemma that tests his values and ultimately changes the course of their lives.