diff --git a/free-programming-books.md b/free-programming-books.md
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@@ -706,6 +706,7 @@
 * [Dev Docs](http://devdocs.io/)
 * [Managing Space and Time with JavaScript - Book 1: The Basics](http://www.noelrappin.com/)  - Noel Rappin
 * [Learn to Code JavaScript by Playing a Game](http://codecombat.com)
+* [You Don't Know JS](https://github.com/getify/You-Dont-Know-JS)
 
 ####Angular.js