Spook Country by William Gibson
Hollis Henry, the former lead singer of a rock group "The Curfew" is trying to reinvent herself as a journalist for a secretive technology-focused magazine called Node. She has been sent to find Bobby Chombo, an elusive global-positioning-system expert.
In Spook Country, Gibson, the author of the modern SF classic Neuromancer, explores a time when media and technology no longer reflect culture, but rather have become culture. That time, according to the prescient Gibson, is right now.