Best way to learn React for someone who's used to Rails?

Hi,

I want to learn React, however Googling 'learn react' gives me a billion results and I don't want to start on a subscribe to a tutorial site or buy a book if there's a better one out there.

I'm great with javascript, so do not need to pick that up, and have hacked around and forked a few React projects but never really known quite what's going on or where to start with them.

I was wondering what is the best way to learn it. I am best I think learning from videos, however books are also great too. I'm not so good with scrolling through tutorial websites.

Thanks very much!