https://store.dominicstpierre.com/build-saas-apps-in-go?coup...
I hope the book is good, but I guess I'll never know.
You already know the book is pretty good, you just wanted to complain about DRM, I suspect. I hope that's not the case.
I'd also recommend learning to write web APIs with the standard library so you know the primitives. Writing Web Applications[1] on golang.org covers the basics.
context: working in large org building backend services that speak to other backend services via various crappy http / rest / soap APIs.
(Repo: https://github.com/astaxie/build-web-application-with-golang)
From the writer of this blog: https://www.thepolyglotdeveloper.com/
https://astaxie.gitbooks.io/build-web-application-with-golan...
https://vluxe.io/golang-router.html
For an example