PhD Grind (pdf url) is not strictly speaking a book, but rather a pdf memoir. It is the story of a PhD, during its six long years, in the USA in Computer Science (Model checking & HCI).
I found this book fantastic. As a first-year PhD, it really talked to me. I was interested to discover the PhD system in the USA, which sounds quite different from what I know in France.
I also very much enjoyed the unfiltered speech of a student who had doubts, failures, and success (spoiler: there is a happy ending.)
If I find motivation, and time, I would like to write such memoir about my own thesis.