The first edition of the Tango with Django book (available at: www.tangowithdjango.com) was launched in October 2013 by Leif Azzopardi and David Maxwell while at the University of Glasgow. The book has been used as the course textbook for web development courses within the University, and since its launch we've had over a million visitors to the website. We're now at the third iteration of the book which has been significantly expanded - the book is focused on Django 1.9 but is also compatible with Django 1.10 and 1.11, as well as being able to run with Python 2.7+ and Python 3.5+.