This book is a very high-level overview of the current thinking and challenges in modern software architecture and design. If you can stand the overuse and overstretching of terms from physics and biology such as "quantum", "quanta", "fitness function", etc. you can have a general idea about what it means to design for changeability.

If you subscribe to the idea that the software architecture means "the parts that are difficult to change", you already know how important to it is to design for relatively easy change, because change is one thing that will certainly happen to any software-intensive system that can survive at least a few months.

Some parts of the book is like time travel where the authors compare the architectural patterns from the end of 1990s and beginning of 2000s, and how things changed as of 2018: within the space of few pages they compare and contrast enterprise service bus based architectures with microservices.

The downside of the book: if you aren't already familiar with most of the concepts and techniques, it'll be difficult to understand what the book is all about. And if you're already familiar, then you know that for many of the topics mentioned, there are dedicated and well-written books.

If you want a very broad and high level overview, this book might serve you for a short period of time. If you want to go into more detail, you'll have to dive into titles such as "Infrastructure as Code: Managing Servers in the Cloud" and "Architecting for Scale: High Availability for Your Growing Applications|". ( )