the first theme exposed here (fairies/elves/fair folk are scary) is core to a few Discworld novels, mainly "Lords and Ladies", which includes this wonderful bit

the first theme exposed here (fairies/elves/fair folk are scary) is core to a few Discworld novels, mainly "Lords and Ladies", which includes this wonderful bit > Elves are wonderful. They provoke wonder. Elves are marvellous. They cause marvels. Elves are fantastic. They create fantasies. Elves are glamorous. They project glamour. Elves are enchanting. They weave enchantment. Elves are terrific. They beget terror. The thing about words is that meanings can twist just like a snake, and if you want to find snakes look for them behind words that have changed their meaning. No one ever said elves are nice. Elves are bad.