add free ebook notification

Author: Packt-ITService

README.md

@@ -52,3 +52,7 @@ In about 100 Steps, we explore the most important Python Programming Language Fe
 
 * [Hands-On Bayesian Methods with Python [Video]](https://www.packtpub.com/big-data-and-business-intelligence/hands-bayesian-methods-python-video?utm_source=github&utm_medium=repository&utm_campaign=9781789347692)
 
+### Download a free PDF
+
+ <i>If you have already purchased a print or Kindle version of this book, you can get a DRM-free PDF version at no cost.<br>Simply click on the link to claim your free PDF.</i>
+<p align="center"> <a href="https://packt.link/free-ebook/9781789611960">https://packt.link/free-ebook/9781789611960 </a> </p>