This book surveys the most recent aspect of Harry Callahan's distinguished career: his exclusive devotion to color photography. Long admired for his eloquent work in black and white, Callahan has received considerable attention since 1980 for his pioneering work in color. He began using color materials in 1941, and worked intermittently in this medium until 1964. Little use was mad of color from that time until the mid-1970s, however.