I read Goならわかるシステムプログラミング to catch up with Go in system layer.
I do not have much experience in Go. Definitely I finished their tutorial, but have not experienced writing their code. Then, I needed to learn golang more to write code in production level.
This book helped me to understand golang, especially network stuff, in Japanese. I already understand many of them, but a couple of topics gave me insights. It also helped me to arrange my knowledge about go 🙂
Btw, the book addressed ACTOR model in Erlang. I experienced the model in Erlang/Elixir, so I could compare goroutine model and their model.