All of my books are free to read online and will remain so forever! I hope you’ll like them so much that you’ll buy the offline versions.
Speaking JavaScript
An in-depth guide to JavaScript (up to and including ES5) for programmers.
Exploring ES6
The most comprehensive book on ECMAScript 6 (ECMAScript 2015). But don’t be intimidated: you can decide how deep you want to dig.
Exploring ES2016 and ES2017
This book covers the latest versions of JavaScript as they are created.
Setting up ES6
Using and configuring Babel 6 in web browsers and on Node.js.