• Automate the Boring Stuff with Python
• Invent Your Own Computer Games with Python
• Coding with Minecraft
• Cracking Codes with Python
• Think Python: How to Think Like a Computer Scientist
• Learn Python the Hard Way
• OpenGL with PyOpenGL introduction and creation of Rotating Cube

• Paolo Amoroso curates a list of free Python books on GitHub.
• Ebook foundation's list of free Python books (plus tons of books for other languauges)
• Another list, this time compiled by finxter.com

• Automate the Boring Stuff with Python
• Python Tutorial for Beginners

• Nerd Paradise's 4 Minute Python Crash Course

• edabit's Python coding challenges

• CodeCombat