This attractive book provides a fresh viewpoint on the creative processes of some of the most significant photographers of the 20th century. The proof sheet or contact sheet was essential to the practice of photography for many years prior to the development of digital technology. Photographers using roll film initially saw positive images in the contact's small-scale grid, which was designated for printing and served as a permanent record. Contact sheets provide a unique glimpse into the working process because they were often kept hidden. Photographers also saw the proof sheet's artistic potential, and they occasionally displayed the contact grid as a completed work of art.