[johnsonjo]

Dr. Rauschmayer also has several books free to read online available here http://exploringjs.com/. I definitely recommend his books they are often quite thorough.

[johnsonjo]

There's also Nicholas C. Zakas' book understanding es6. It's free to read online too. https://leanpub.com/understandinges6/

I haven't read this one but I started one of his other books that was a very large book of JavaScript showing warts and all.

I would definitely support these authors though by buying the books if you have the money to do it.