Droga5 has devised a location-based scavenger-hunt game to promote Jay-Z's upcoming memoir, Decoded. Giant pages are showing up in places mentioned on those actual pages in the book—all relevant in some way to Jay-Z's life. The people who discover them first can "claim" them via text message, and then "decode" them online , with help from Microsoft's Bing search engine. The pages will pop up in unconventional public areas like swimming pools and clothing racks (something IsReads  has been doing to great effect). It's a very cool campaign, marred only by the grand prize—two tickets to see Jay-Z and Coldplay. That stretches the concept of winning awfully far. See a few more images, from pages already found, after the jump.