hi /g/ so I have a stupid question I'm looking for suggestions

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hi /g/

so I have a stupid question

I'm looking for suggestions for books / reference on software design. I don't care if it's called architecture or engineering or programming or whatever but what I'm looking for is why functions and classes are structured a certain ways and why. I'm hoping for language agnostic general programming problems that are common to all software languages / designs. I get this is impossible to a degree as certain things are language specific.

I don't know the correct terminology for this. It's somewhere just below design patterns. Does anyone have a word for this?

thanks