This is the only practical book on event sourcing and cqrs I have ever seen.
After hearing about it all the time on HN I had never seen an actual implementation of it, this book uses JS so its easy to understand for any software engineer.
It’s a really practical treatment of CQRS & ES with JS examples. I had heard about CQRS & ES on HN for years but I had never seen any system that actually used it or any practical examples so this book is amazing cause it takes you through how to build a system using them.
Among other benefits sync over AMQP provides is the fact that you don't really need a service discovery mechanism because interested service will find & serve your request itself. It also means that you won't need to put the services behind a firewall or implement some sort of inter-service auth (when firewall isn't an option, read: Heroku), because nothing is exposed to the web.
Will definitely get into it more deeply in Practical Microservices. Stay tuned!