Contrasto has released the second chapter of its iPad app series, “Great Photographers.” Dedicated to William Klein, the multimedia app contains 393 images, videos, lessons, essays, interviews and a virtual exhibition. Klein’s universe is explored by critical essays by prominent figures of the history of photography as Robert Delpire, Max Kozloff, Alessandra Mauro, Quentin Bajac and David Company. Priced at €9.90 / $10.99, the app is available in English, Italian and French via the iTunes App Store.