Amazon helped me find a paragraph in a book that I vaguely remembered from a year ago. After five minutes of flipping through the book, I was able to find it in one search. Unfortunately the paragraph wasn’t directly relevant to what I was researching (viral marketing). Fortunately, I saved an obsessive half hour scanning for it.
on Page 94: “… Guide and Parade ad, he had his art director put a little gold box in the corner of the order coupon. …”
– from “The Tipping Point” by Malcom Gladwell
The point being made was that advertising is more sticky if it is interactive and incorporates the real world.