If you are looking for an introduction to the cloud, this book can be somewhat useful. Unfortunately it lacks detail, if you want to delve deeper into the inner workings of Cloud Adoption.
It's also very Microsoft (Azure) centric. In consequence it doesn’t cover the strengths and weaknesses of the most popular current cloud offerings and any adoption issues of all the relevant offerings on the market (Amazon, Salesforce, Oracle, SAP, etc).
There are a few case studies in the epilogue, but tend to be on the superficial, ie, it avoids any of the practicalities and potential pitfalls of moving to the cloud.