%!s(int64=12) %!d(string=hai) anos · b08bd1c626
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -139,6 +139,7 @@
 
				 * [Wikibooks: Programming](http://en.wikibooks.org/wiki/Category%3aComputer_programming)
			
 
				 * [JSBooks - directory of free javascript ebooks](https://github.com/revolunet/JSbooks)
			
 
				 * [Learn X in Y minutes](http://learnxinyminutes.com/)
			
 
				+* [Messaging as a Programming Model](https://leanpub.com/messaging_as_a_programming_model)
			
 
				 
			
 
				 
			
 
				 ###Graphics Programming