Scientific Visualization: Python + Matplotlib (2021) by Nicolas P. Rougier
Mastering matplotlib by Duncan M. McGreggor
Interactive Applications Using Matplotlib by Benjamin Root
Matplotlib for Python Developers by Sandro Tosi
Matplotlib chapter by John Hunter and Michael Droettboom in The Architecture of Open Source Applications
Ten Simple Rules for Better Figures by Nicolas P. Rougier, Michael Droettboom and Philip E. Bourne
Learning Scientific Programming with Python chapter 7 by Christian Hill
Hands-On Data Analysis with Pandas, chapters 5 and 6 by Stefanie Molin
Plotting with matplotlib by Mike Müller
Introduction to NumPy and Matplotlib by Eric Jones
Anatomy of Matplotlib by Benjamin Root and Hannah Aizenman
Data Visualization Basics with Python (O'Reilly) by Randal S. Olson
Matplotlib Introduction by codebasics
Matplotlib by Derek Banas
Matplotlib tutorial by Nicolas P. Rougier
Anatomy of Matplotlib - IPython Notebooks by Benjamin Root
Beyond the Basics: Data Visualization in Python by Stefanie Molin
Past winners for JDH plotting contest by Nelle Varoquaux
The Python Graph Gallery by Yan Holtz