For years I would look out the window of my Manhattan office and watch fantastic images take shape against the sky. Giant star-crossed lovers. Machines at war. A woman as tall as a skyscraper. The images were ads for upcoming Hollywood movies. They were painted on the blank outer wall of a 21 story office tower a few blocks uptown. I photographed them in every light and weather for three New York season-cycles. They dominated the skyline for a few weeks, then disappeared in a day, whitewashed into oblivion by painters cranking up and down on scaffolds, who would, the following morning, begin to roll and brush in the next fantasy. This book, "Big Movies," records the outsized grandeur of those half-silly transformations.