This book covers the operation part of DevOps, and so is most suited for operational professionals who are responsible for managing microservices-based applications.
Anyone interested in starting out on a career as an operations professional (the second part of DevOps) will benefit from reading this book. This book is about managing microservices applications when in the production environment from the operations perspective.
Even if you do not have experience in developing microservices applications, you can take the role of an operations professional or become a Site Reliability Engineer (SRE). A knowledge of Kubernetes and Docker is a prerequisite, but it is not necessary to know SOA and ESB in depth.