Terry Pratchett's elves are quite a bit different from these elves, though... what with not being cannibals that live (literally) inside trees.
No, that's Dryads. Elves are from his book Lords And Ladies. As the full quote goes:
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.
She's gotten quite a charm to her.Even I've fallen for her.I don't know...how to face you again...I'm so sorry, Juri...so sorry...Ever since your man became a woman......