The late photographer Philippe Halsman drowned the world in snapshots. His sensational portraits of universal superstars like Marilyn Monroe and Alfred Hitchcock are larger than life, and he produced dozens of powerful collections. Halsman is admired by millions in the art world as a camera wizard; however, the public didn't see that his skills reached beyond the yellow in Marilyn's hair. Halsman's obscurity and genius is shown in a new collection, Unknown Halsman, conceived and crafted by his grandson, Oliver Halsman Rosenberg. In talking with Rosenberg about the upcoming book, I learn that what goes on behind the lens will never be more than a mystery.