The second book is about the technological developments of ~1850-1920 (cameras, spectroscopes, big telescopes) and is also really interesting. Fraunhofer also makes an appearance here - he was one of the first people to measure the absorption spectrum of the sun. These absorption features are still called Fraunhofer lines [3]. Later Kirchhoff (of the circuit laws) and Bunsen (of the burner) worked out what caused these.
The personal histories of all these people are also really cool, and these books discuss the people as much as the science/tech. It's amazing for how many people a small bit of luck was needed (or in Fraunhofer's case with the house collapsing -> meeting the elector, a big bit of luck)!
[1] https://www.amazon.com/Parallax-Measure-Alan-W-Hirshfeld/dp/... [2] https://www.amazon.com/Starlight-Detectives-Astronomers-Ecce... [3] https://en.wikipedia.org/wiki/Fraunhofer_lines