Another great report / publication from Lightbend crew. Again - very concise and to the point. As the subtitle suggest it's about actors (well... Akka basically). Personally (because of the title - which is "Designing...") I thought it would be somewhere between Reactive microservices architecture and Developing Reactive Microservices. Well, I didn't find it this way. It seems to be more of a general introduction to actors and benefits of actor oriented approach. Although not quite what I was expecting it's definitely an interesting reading. Well written and easily digestible for a person willing to get some introductory material about actors or even for your manager (well in that case still *digestible* but may result in some mild stomach upset).
Quite nice summary of actor based distributed architecture. Explaining benefits on clear showcases. As I'm not familiar with actor model there was good overall information for me to take from (e.g. how circuit breaker works there, what could be benefits of usage...)
Not bad, not excellent. Just good. Probably good enough.
Without any problems, you can find more, probably better, resources about Actors in Systems design. But, this book does its job. It's a quite clear and well-written, fundamental explanation of Actors in a Distributed world. But that's all. This book describes only the most basic parts of Actors, do not give any hints where to find more.