Cited as a reference
Feynman: Magnets FUN TO IMAGINE 4 But see NEW UPDATED file at https://tinyurl.com/ycphc432
Why people recommend it
The Feynman clip on why asking how magnets work has no simple answer, linked when a question demands a fundamental why rather than a how.
Watch for: Philosophy of explanation, not a tutorial
In their words
Most of your question is answerable, but to your question of "why", I suggest you watch this.
krb686 on electronics.stackexchange.com, Nov 2013. CC BY-SA.