Added "Mobile Developer's Guide to the Galaxy"

free-programming-books.md

@@ -340,6 +340,7 @@
 * [Learn to Program](http://pine.fm/LearnToProgram/)
 * [Linked Data Patterns: A pattern catalogue for modelling, publishing, and consuming Linked Data](http://patterns.dataincubator.org/book/) - Leigh Dodds, Ian Davis
 * [Magic Ink: Information Software and The Graphical Interface](http://worrydream.com/#!/MagicInk) by Bret Victor
+* [Mobile Developer's Guide to the Galaxy](https://leanpub.com/mobiledevelopersguide)
 * [Modeling Reactive Systems with Statecharts](http://www.scribd.com/doc/167971960/Modeling-Reactive-Systems-With-Statecharts)
 * [Mother Tongues of Computer Languages](http://www.digibarn.com/collections/posters/tongues/) (PNG)
 * [Networks, Crowds, and Markets: Reasoning About a Highly Connected World](http://www.cs.cornell.edu/home/kleinber/networks-book/)