Pinpoint: How GPS is Changing Technology, Culture, and Our Minds by Greg Milner

A fascinating tale of the origins of GPS, how it developed, and how it is transforming life. As the only global "utility," it is at the same time curiously vulnerable and quite robust. It seems there is now no going back. What could go wrong? There are some backups being made, but dependence on GPS is becoming very deep. Written at just the right level of technical detail for my taste.