We explore how the modern urban environment has transformed into a "Sentient City," turning everyday infrastructure into a surveillance dragnet. We detail how streetlights listen to your phone, how retail stores digitize your hesitation, and how ultrasonic beacons link your physical location to your digital profile.

Chapters:

• The Biometric Border: How grocery stores like Wegmans are replacing simple transactions with facial mapping and biometric data collection.
• The Infrastructure of Observation: Streetlights are now "Smart Nodes" equipped with optical sensors, microphones, and Bluetooth sniffers that log your movement without a warrant.
• The Shadow Network: Amazon Sidewalk’s use of the 900 MHz LoRa spectrum to create an inescapable mesh net ...