That’s a cool cross reference, Len.

Wikipedia on William Gibson – Spook Country

A political thriller set in contemporary North America, it followed on from the author’s previous novel, Pattern Recognition (2003), and was succeeded in 2010 by Zero History, which featured much of the same core cast of characters. The plot comprises the intersecting tales of three protagonists: Hollis Henry, a musician-turned-journalist researching a story on locative art; Tito, a young Cuban-Chinese operative whose family is on occasion in the employ of a renegade ex-CIA agent; and Milgrim, a drug-addled translator held captive by Brown, a strangely authoritarian and secretive man. Themes explored include the ubiquity of locative technology, the eversion of cyberspace and the political climate of the United States in the aftermath of the September 11, 2001 attacks.

Following the links, here’s the article on locative media

Locative media or Location-based media are media of communication functionally bound to a location. The physical implementation of locative media, however, is not bound to the same location to which the content refers.

Location-based media (LBM) delivers multimedia and other content directly to the user of a mobile device dependent upon their location. Location information determined by means such as mobile phone tracking and other emerging Real-time locating system technologies like Wi-Fi or RFID can be used to customize media content presented on the device.

Locative media are digital media applied to real places and thus triggering real social interactions. While mobile technologies such as the Global Positioning System (GPS), laptop computers and mobile phones enable locative media, they are not the goal for the development of projects in this field.