Merge pull request #1620 from natehefner/master

Add iOS App Reverse Engineering Book

free-programming-books.md

@@ -573,6 +573,7 @@ Original Source: [List of freely available programming books](http://web.archive
 * [Hacking the Xbox: An Introduction to Reverse Engineering](http://www.nostarch.com/xboxfree/) - Andrew "bunnie" Huang
 * [Reverse Engineering for Beginners](http://beginners.re/) (PDF) - Dennis Yurichev
 * [BIOS Disassembly Ninjutsu Uncovered 1st Edition](http://bioshacking.blogspot.com/2012/02/bios-disassembly-ninjutsu-uncovered-1st.html) (PDF) - Darmawan Salihun
+* [iOS App Reverse Engineering](https://github.com/iosre/iOSAppReverseEngineering) (PDF)
 
 
 #### Security