Merge pull request #599 from alexanderfefelov/master

Added "Linked Data Patterns"

free-programming-books.md

@@ -338,6 +338,7 @@
 * [How to Think Like a Computer Scientist](http://openbookproject.net/thinkcs/) -  Peter Wentworth, Jeffrey Elkner, Allen B. Downey, and Chris Meyers
 * [I Am a Bug](http://www.amibug.com/iamabug/p01.html)
 * [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
 * [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)