He is the author of “A Vast Amount of Trouble,” a book about the 1909 Spring Creek Raid; “Goodbye, Judge Lynch,” a book about a 1902 murder north of Ten Sleep; and “Wyoming Range War,” a book about the 1892 Johnson County War, which was given the 2010 history award by the Wyoming State Historical Society and is used as a text in the History of Wyoming course taught at the University of Wyoming. His most recent book, “The Trial of Tom Horn,” was released in March by the University of Oklahoma Press.