It is the only one of Diana Wynne Jones's novels to have been made into a movie (so far). See Howl's Moving Castle movie.
see also: Howl's Moving Castle (spoilers)
When Sophie Hatter falls under a spell, she decides she has nothing more to lose and makes her way to the moving castle that hovers on the hills above Market Chipping But the castle belongs to the dreaded Wizard Howl whose appetite, they say, is satisfied only by the souls of young girls...
LR 10/10 My favourite DWJ book, How's Moving Castle is pure magic, with wit and nailbiting moments. I couldn't put this book down from the word go and have loved it ever since. My only fault would be that this book lacks a little in even pacing.
Fenric 10/10 I can't give this book a high enough rating. Not only is it my favourite DWJ book, it is my favourite childhood novel as well! The story is magical and the characters are amazing!
Fi 10/10 My all time favourite book. I've read it about once a year every year since I was ten (14 years) and I still love it just as much every time I re-read it as I did the first time. Plot - satisfyingly chewy; Characters - vivid, whether lovable or fiendish; Ideas - some of the best in all DWJ (and that's saying something).