free JavaScript books: You Don't Know JS @ GitHub

You-Dont-Know-JS/README.md at master · getify/You-Dont-Know-JS · GitHub
This is a series of books diving deep into the core mechanisms of the JavaScript language.

• "Up & Going"
• "Scope & Closures"
• "this & Object Prototypes"
• "Types & Grammar"
• "Async & Performance"
• "ES6 & Beyond"

You don't know JS with Getify (Kyle Simpson) on the Hanselminutes Technology Podcast: Fresh Air for Developers

Advanced JavaScript | Pluralsight
by Kyle Simpson

Kyle Simpson, getify