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I don't use paperback books to learn programming anymore, so I can't really advise you on books, but below are some further resources you may find useful. Otherwise, if you go to www.google.com and type "free Python eBooks books" you can probably find a lot of books that way. Best of luck!
Some further resources on Python:
https://realpython.com/tutorials/advanced/
https://www.edx.org/learn/python
https://www.learnpython.org/
https://www.udemy.com/topic/python/free/
https://www.udemy.com/python-core-and-advanced/
https://www.udemy.com/python-programming-beginners
https://www.udemy.com/deep-learning-prerequisites-the-numpy-stack-in-python
https://www.udemy.com/python-tutorial-for-beginners
https://www.udemy.com/python-oops-beginners
https://www.udemy.com/python-3-bootcamp
https://www.udemy.com/try-django-v1-11-python-web-development
https://www.udemy.com/pythonforbeginnersintro
https://www.udemy.com/learn-python-build-a-virtual-assistant-in-python



