Ask HN: Best introduction to OOP?

[flevours]

I am trying to find a good ways to teach OOP to fellow newbie programmers. Do you have any suggestions regarding freely available articles or books that cover this topic?

[egyptik]

This may be useful:

https://www.youtube.com/playlist?list=PLGLfVvz_LVvS5P7khyR4x...

https://www.youtube.com/watch?v=vNHpsC5ng_E&list=PLF206E9061...