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I'm looking around for a book (or something) that can help me fill in holes in my Compose understanding. I feel like I get some things, and other things just still seem kind of like magic to me (been chipping away with mixed success at understanding text input, IME, focus, this morning). I was growsing around and stumbled on the "Jetpack Compose Internals" by Jorge Castillo which, at least from its title, seems like a good thing from where I'm at. If you can offer any positive or negative comments on this text (both its efficacy and how current it might be), I would appreciate it. Feel free to DM if that allows you to be more candid.

I read it, it is good overall but extremely theoretical. You won't see code snippets, API examples, architecture diagrams, uml classes or anything like that. Which I love to see because sometimes these visuals help to grasp stuff easier. 
But for a general overview of how the compose mechanics and the concepts behind it, is worth the reading.
I am really looking forward to a book coming out of Google with the visuals I described above. If you happen to know one, let me know.

Any other book you guys know about? Apart from this Jetpack compose internals

Nope, only that one I know :disappointed: