I found all the Python books available dealt with version 2.x,
I searched "python 3 book" and immediately come up with
Programming in Python 3
Dive Into Python 3
Python 3 for Absolute Beginners
+ 'free'
Non-Programmer's Tutorial for Python 3
https://en.wikibooks.org/wiki/Non-Programmer's_Tutorial_for_Python_3
http://www.onlineprogrammingbooks.com/python/ has
Learning to Program Using Python (2&3)
Python Cookbook Third Edition (py 3)
http://www.openbookproject.net/thinkcs/python/english3e/
How to Think Like a Computer Scientist:Learning with Python 3
Many of these are updated versions (2 or 3 years old) of well known py2
books.
--
Terry Jan Reedy
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https://mail.python.org/mailman/listinfo/python-list