Pinpoint, How GPS is Changing, Technology, Culture, and Our Minds Lots of talk about timing, and precision, etc. Mentions of the Gran Sasso experiments, etc. Not much about the mechanics of how PN ranging works or how you make a quiet oscillator, but a lot about what it buys you. A couple small typos (e.g., 1 microsecond is not 200 miles.. that's 1 millisecond),but a fairly well researched book, with lots of interesting stuff (most of which we've discussed on Time-Nuts)..