by Diana Wynn Jones
I still haven't seen the movie, but I found the book delightful. It's about a fairytale land (witches, wizards, seven-league boots) full of genre savvy inhabitants. So the eldest daughter knows that, as the eldest, she's doomed to failure while her spunky youngest sister wins the day.
Cute without being too cloying, good politics, nice characters. Warm, kind story.