Book Review: Reactive Services Architecture - Design Principles for Distributed Applications

A friend of mine gave me a copy of the new book "Reactive Services Architecture - Design Principles for Distributed Applications" by Jonas Bonér.  My friend was quite taken by the content and asked me what I thought of it. Having been working with microservices architecture and writing about them for a couple of years, I was intrigued and took up the gauntlet.
I was immediately struck by the word "Reactive" and wondered what was the difference between a "reactive" microservice and a non-r...