Update free-programming-books.md

free-programming-books.md

@@ -93,7 +93,7 @@
     * [Standards](#standards)
     * [Theoretical Computer Science](#theoretical-computer-science)
     * [Web Performance](#web-performance)
-* [LaTeX](#latex)
+* [LaTeX](#latex)py
 * [Limbo](#limbo)
 * [Linux](#linux)
 * [Lisp](#lisp)
@@ -1483,6 +1483,7 @@ See also [TeX](#tex)
 * [Web2py: Complete Reference Manual, 6th Edition (pre-release)](http://web2py.com/book) (2.5 - 2.x)
 * [Welcome to Problem Solving with Algorithms and Data Structures](http://interactivepython.org/runestone/static/pythonds/index.html) - Brad Miller and David Ranum
 * [Wikibooks: Python Programming](http://en.wikibooks.org/wiki/Python_Programming) (2.7)
+* [CodeCademy Python](http://www.codecademy.com/tracks/python)
 
 
 #### Django