Add You Don't Know JS to books

Author: sleeptillseven

README.md

@@ -1578,6 +1578,7 @@
   - [Third Party JavaScript](http://manning.com/vinegar/) - Ben Vinegar and Anton Kovalyov
   - [Effective JavaScript: 68 Specific Ways to Harness the Power of JavaScript](http://amzn.com/0321812182) - David Herman
   - [Eloquent JavaScript](http://eloquentjavascript.net) - Marijn Haverbeke
+  - [You Don't Know JS](https://github.com/getify/You-Dont-Know-JS) - Kyle Simpson
 
 **Blogs**