REACTJS.co is a project based method to learn the React Redux, the Right Way. You will make a project while learning all the implementation details. It's a reading with good visuals, so you will be able to learn a lot.
This e-book is 100% online (no emails required, no PDFs to download etc.). It contains learning materials for junior and senior front-end developers who want to master React Redux (for React Native tutorial click here).
If you have any problems or want to share you feedback, feel free to contact me at firstname.lastname@example.org