There’s a book of fiction about a girl who lives in or near a castle- I seem to remember it won an award- I think I found it at a Scholastic book fair. This girl is somehow considered badly behaved- and she’s allowed to run wild. She is kidnapped by fairies who live in a huge underground warren (I think under a mountain) to be a servant. They’re drugged every night with the food that she discovers if she skips, she’s more alert but struggles with claustrophobia. Because of her refusal to eat the drugged food, she catches the interest of the Queen of fairies who teaches her, mostly through humiliation, how to walk and move gracefully. She’s eventually rescued and the fairies are forced into the other world, sealing their mountain.
I can’t find this book at all- My sister claims she never read it and I looked through the books at my parents house without finding it.