What do you call a hundred Coldplay fans in a library? No, it's not the setup to a bad joke, just the start of the English rock band's globe-spanning scavenger hunt. To promote their upcoming album Ghost Stories, Coldplay has stashed copies of Chris Martin's lyrics in ghost story books around the globe, and they want fans to find them. The ghost stories will be hidden in libraries scattered around the world, with the band's official Twitter account providing hints along the way. We're not sure what state the books are in, but it's a good guess that they were all yellowed.