Come to Lisbon and I’ll help with the drinking part 
sashaafm
globalkeith
homanchou
Just wrote you the following 5 star review on Amazon.
+1 on hoping you’ll add a section on GenStage. 
This is the best Elixir OTP book I’ve read so far. The example project in the book, building a resource pooler, is substantial enough to dive into some of the more interesting architectural questions around supervision. While other books I’ve read or talks I’ve viewed, enumerate through the nebulous idea of supervision strategies, I still wasn’t sure if I was doing it right. I was left with many questions: How do I add another supervised child dynamically? Does it need to be of the same module type? What if I need to store some state about the supervision, does that go in the supervisor too or should that go in a separate GenServer? Can I control the start order of these processes? All these questions and more were answered as I read chapters 6-8 with great interest. It validated some theories of my own and showed that it’s quite common to use a GenServer within a Supervision Tree to act as the “brains” while Supervisors themselves should concentrate on doing only one thing, supervising. The brains can then add more children to this Supervision Tree or start another Supervision Tree for something else, it’s incredibly flexible and powerful.
While the book does cover the classic basics of Elixir and processes a little bit, at no point does it feel boring. The writing style is clear, fun and easy to understand.
There were a few minor typos, but you can get the source code and errata in the manning forum. I wish there was an additional few chapters on other OTP patterns, particularly GenEvent (now GenStage if that is replacing it) as I think this could be useful for reactive programming/event sourcing.
2
bentanweihao
Author of The Little Elixir and OTP Guidebook
