Try something different with Elixir

I don't mean this as a knock on the author, but outside of full-scale books does anyone know of some resources that go more in depth with building nontrivial systems/apps/programs in Elixir? I would love to dive further but I find my limitation at this point is my understanding of OTP and the core methodologies, but want to get some more familiarity before I take a dive in as deep as a book would require time-wise.

That said, awesome illustration of building something useful with a minimal codebase and really embracing the nature of what the language is built upon. :)