diff --git a/free-programming-books.md b/free-programming-books.md
index 762f39bba420bae23e29627464df10edd1d5c4b4..0e6a1c76548ff7b23678f159e7d60249ba4a373b 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -1433,8 +1433,9 @@ See also [TeX](#tex)
 * [Invent Your Own Computer Games With Python](http://inventwithpython.com/chapters/) - Al Sweigart (3.1)
 * [Learn Python The Hard Way](http://learnpythonthehardway.org/book/) (2.5 - 2.6)
 * [Learning to Program](http://www.freenetpages.co.uk/hp/alan.gauld/) (2.3)
-* [Learn to Program Using Python](https://www.ida.liu.se/~732A47/literature/PythonBook.pdf) - Cody Jackson
 * [Learning to Program with Python](http://python.cs.southern.edu/pythonbook/pythonbook.pdf) - Richard L. Halterman (PDF) (3.2)
+* [Learn Python in Y minutes](http://learnxinyminutes.com/docs/python/)
+* [Learn to Program Using Python](https://www.ida.liu.se/~732A47/literature/PythonBook.pdf) - Cody Jackson
 * [Lectures on scientific computing with python](https://github.com/jrjohansson/scientific-python-lectures) - J.R. Johansson (2.7)
 * [Making Games with Python & Pygame](http://inventwithpython.com/pygame/chapters/) - Al Sweigart (2.7)
 * [Modeling Creativity: Case Studies in Python](http://www.clips.ua.ac.be/sites/default/files/modeling-creativity.pdf) - Tom D. De Smedt (PDF)
@@ -1465,6 +1466,7 @@ See also [TeX](#tex)
 * [Test-Driven Web Development with Python](http://chimera.labs.oreilly.com/books/1234000000754/index.html) (3.3 - 3.x)
 * [Text Processing in Python](http://gnosis.cx/TPiP/) - David Mertz (2.3 - 2.x)
 * [The Art and Craft of Programming](http://beastie.cs.ua.edu/cs150/book/index.html) (3.x)
+* [The Python Ecosystem: An Introduction](http://mirnazim.org/writings/python-ecosystem-introduction/)
 * [The Programming Historian](http://niche-canada.org/research/niche-digital-infrastructure-project/the-programming-historian/) - William J. Turkel, Adam Crymble and Alan MacEachern
 * [Think Python](http://www.greenteapress.com/thinkpython/) - Allen B. Downey (2.x & 3.0)
 * [Web2py: Complete Reference Manual, 6th Edition (pre-release)](http://web2py.com/book) (2.5 - 2.x)