This is a far-ranging take on the history of GPS and related technologies. Every chapter is a delightful essay on its own, and taken together they give a comprehensive overview of the many aspects of our lives affected by this system of technologies. The author makes a convincing case that GPS is a more important development than the internet. This is a strong contender for the best book I have read so far this year.

Rather than try to discuss the book in detail, which would not do it justice, I made a mind map of the most important themes of the book: