I'd advise some Discworld, there's a lot of interesting stuff hidden away in what looks like a simple series of fantasy parodies.
'People's lives DO pass in front of their eyes just before death. It's called 'living'.'
'Always be wary of any helpful item that weighs less than its operating manual.'
It was so much easier to blame it on Them. It was bleakly depressing to think that They were Us. If it was Them, then nothing was anyone's fault. If it was us, what did that make Me? After all, I'm one of Us. I must be. I've certainly never thought of myself as one of Them. No one ever thinks of themselves as one of Them. We're always one of Us. It's Them that do the bad things.
A marriage is always made up of two people who are prepared to swear that only the other one snores.
Getting an education was a bit like a communicable sexual disease. It made you unsuitable for a lot of jobs and then you had the urge to pass it on.
And, while it was regarded as pretty good evidence of criminality to be living in a slum, for some reason owning a whole street of them merely got you invited to the very best social occasions.
Just because it's not nice doesn't mean it's not miraculous.
"I know about people who talk about suffering for the common good. It's never bloody them! When you hear a man shouting "Forward, brave comrades!" you'll see he's the one behind the bloody big rock and the one wearing the only really arrow-proof helmet!"
- Rincewind gives a speech on politics.
Essentially,after the first few books, it stopped being a simple fantasy series and started being a look at our own world thru discworld tinted glasses. Each one picking on a facet of our life, like music, sport, money, war, the media, movies, death, sexism, and more.