Swizec Teller is running a free course at https://school.shoutem.com/. Stephen Grider has a few good video courses on Udemy such as https://www.udemy.com/react-native-advanced/.

http://www.reactnativeexpress.com is a great resource.

I just gave a talk on this at uikonf. Is their anything in particular you would like to know?

Not in particular. I appreciate the suggestion of the official documentation. I do need to rtfm, however after that I will be looking for further examples and explanation. Oh, but if there is any useful tooling I should be aware of that would be quite helpful.

Everything by tal kol from wix re performance optimization is a must read. I also recommend checking out infinite reds GitHub.

The Facebook React Native group is also a great resource.

I just started reading the section on animation from the React Native Cookbook and plan to read the rest. So far so good.

Judging from the table of contents, it seems the book gets into more depth than what else is out there.