Recently I was deepening my understanding of Django and by coincidence, I have stumbled upon https://djangodeconstructed.com/.
Mental model for Class-Based Views helped me understand what is happening when calling setup, dispatch, and the other methods from class-based views.
The documentation of Django itself, even though helpful, seemed a bit concise, so this finding was a blessing for me.
Admittedly, Django Deconstructed probably will not appeal to beginners, but for further explorations of the Django land, it is indispensable - unless, of course, you want to dig inside Django code itself.
Personally, I am glad that somebody else spared me the effort.