> Although to be fair, he does tend to revert by the start of his next story.

I'd say that's most of the Discworld series though. Protagonist is living peaceful, MacGuffin ensues chaos, Protagonist (or Arbitrary Thing) saves the day, the Disc goes back to normal, and the Turtle continues to move.

Discworld is my favorite series and I think Hogfather and Feets of Clay should be mandatory reads for people going into AI.