text:  You could tell they were being stolen in New York at the very beginning because when you'd go in and ask for it, it wasn't on display. You had to ask for it, and they had it in a high shelf or in a closet or something. Whether bought legitimately or stolen, Martha and Henry's book was flying off the shelves. But in order to understand why, we need to go back even further to the beginning of the graffiti movement, New York in the 1970s.