I have read most of the chapters in this book. I would say it's mostly about learning the concepts themselves and in this regard the book is extremely helpful.

I have read most of the chapters in this book. I would say it's mostly about learning the concepts themselves and in this regard the book is extremely helpful. Additionally, each chapter has a historical context about Lamport's work and how it influenced future systems, research, etc. It's more like a related work section in a paper. But you could easily skip these parts if you're not interested in them.