We are entering a new state of global hypersurveillance. As we increasingly resort to technology for our work and play, our electronic activity leaves behind digital footprints that can be used to track our movements. In our cars, telephones, even our coffee machines, tiny computers communicating wirelessly via the Internet can serve as miniature witnesses, forming powerful networks whose emergent behaviour can be very complex, intelligent, and invasive. The question is: how much of an infringement on privacy are they? Exposing the invasion of our privacy from CCTVs to blogs, The Spy in the Coffee Machine explores what - if anything - we can do to prevent it from disappearing forever in the digital age, and provides readers with a much needed wake-up call to the benefits and dangers of this new technology.