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This is a manifesto and not a handbook. Over 90% of the content is spent on explaining the problems that devops solves without actually defining what devops is. Frustratingly it contains case studies stating the efficiencies gained by using devops but without actually explaining how. I think any content which could be considered a "handbook" could be condensed into a short chapter.
Dont buy this book if you expect it to teach you how to build a CI/CD DEVOPS environment. It is basically a review/summary of a bunch of research papers that the authors have read, but does not provide any specifics details of how to set up a CI/CD pipepline (only theory). You can get most of the content of this book by reading articles from the web. Also, you can get more specific details of how to implement CI/CD with specific tools, programs, and scripts from other sources. Dont waste your time trying to read this book if you want to deploy CI/CD.
No new idea, just recycle of concepts from "The Goal". The whole book lacks depth and is a compilation of endless quotes from other people's work. I loved the "Phoenix Project" as it was a good translation of "The Goal" to IT, but question is how far you can mild someone else's work?