I'm still learning, but I've really enjoyed this book [1]. It's pretty theory-heavy, especially at first, but overall I have found it fairly approachable.
Also, Tony Hoare's book on CSP is actually a fairly interesting read; certainly interesting if you like Go. You can actually download it legally free here: [2]
In regards to type theory, I'd recommend starting by learning Haskell, just to make the terminology a little less scary, then picking up the book "Basic Simple Type Theory" by J Roger Hindley. Don't let the name fool you, it's still pretty heavy stuff; there's no way I would have been able to get through it if I hadn't learned Haskell beforehand. [3]
Also, Tony Hoare's book on CSP is actually a fairly interesting read; certainly interesting if you like Go. You can actually download it legally free here: [2]
In regards to type theory, I'd recommend starting by learning Haskell, just to make the terminology a little less scary, then picking up the book "Basic Simple Type Theory" by J Roger Hindley. Don't let the name fool you, it's still pretty heavy stuff; there's no way I would have been able to get through it if I hadn't learned Haskell beforehand. [3]
[1] https://www.amazon.com/Programming-Distributed-Computing-Sys...
[2] http://usingcsp.com/
[3] https://www.amazon.com/Simple-Cambridge-Theoretical-Computer...