- The book traces the history of precision engineering from the 18th century to modern times, emphasizing its role in industrial progress.
- Key developments include James Watt's steam engine cylinders, Henry Maudslay's screw-cutting lathe, and the concept of interchangeable parts for firearms.
- Precision enabled mass production, such as Ford's assembly line and Navy block-making machines, boosting efficiency.
- The narrative progresses to jet engines, optics, and semiconductor manufacturing, highlighting extreme precision at nano-scales.
- The book concludes with discussions on wabi-sabi imperfection, SI units, and GPS, though these feel somewhat disconnected.
- The author's father's background and characters' quirks reflect a fascination with precision for its own sake.