James Castle (1899-1977) spent his formative years in remote Garden Valley, Idaho and his adult life at locations near Boise, where, for nearly seven decades, he devoted himself daily to intensive art-making. Castle worked with materials that were immediately available, including a wide range of ephemera--advertisements, periodicals, and packaging--that he manipulated with soot, sticks, string and improvised colors to create an elaborate and unmistakable...