Adding @hadoop-illuminated to the free book list.
@@ -446,6 +446,7 @@
###Hadoop
+* [Hadoop Illuminated](http://hadoopilluminated.com/book.php) - Mark Kerzner & Sujee Maniyam
* [Programming Pig](http://chimera.labs.oreilly.com/books/1234000001811/index.html) - Alan Gates
Josh Davis