Advertise new search engine

README.md

@@ -6,6 +6,8 @@ This list initially was a clone of [stackoverflow - List of Freely Available Pro
 
 Moved to GitHub for collaborative updating and for the site mentioned above.
 
+### NEW : Search inside free-programming-books.md (and whole lot more of learning resources)
+[resrc.io/search](http://resrc.io/search/)
 
 ### How To Contribute
 It's [easy](https://github.com/vhf/free-programming-books/wiki/Contribution). Please read [CONTRIBUTING](/CONTRIBUTING.md).