Hacker News story: Ask HN: What's a good introduction to the actor model?

Ask HN: What's a good introduction to the actor model?
I'd like to learn about the actor model, and especially about its use in real world asynchronous (networking) applications. What I've seen so far are contrived examples that demonstrate the similarity (or differences) to OOP or just showcase message passing, but that's barely enough to get a feel for how a real program would be structured around the actor model. Books, tutorials, and videos are welcome. It would also be nice to study the code for a small (<10k LoC) application that does more than contrived examples. 0 comments on Hacker News.
I'd like to learn about the actor model, and especially about its use in real world asynchronous (networking) applications. What I've seen so far are contrived examples that demonstrate the similarity (or differences) to OOP or just showcase message passing, but that's barely enough to get a feel for how a real program would be structured around the actor model. Books, tutorials, and videos are welcome. It would also be nice to study the code for a small (<10k LoC) application that does more than contrived examples.