Ask HN: Best book (or other media) to learn lua from?
What it says on the tin.
I have the feeling that there is no "intermediate Lua". After you grasp the basics, the next step is really advanced stuff. The book helps you make that transition.
Depending on how deep into the rabbit hole you want to go, reading the VM source code is instructive too (it's a pleasant read at ~10kloc. I'd actually recommend reading it on the website as they've hyperlinked much of the code.)
https://sites.google.com/a/deepmind.com/dqn/ https://news.ycombinator.com/item?id=11278065