I decided on Howl's Moving Castle - Diana Wynne-Jones.I finished Raven Stratagem last night. Mostly good, though I felt a few things were poorly explained in the rush to the end (I don't know if it's me, but there are an awful lot of times when I've said the end feels rushed!).
Not made my mind up yet what's next, I bought the third book not long after starting this one, but there was a bit in the book that wouldn't have been a huge surprise if I'd read it straight after the first, so I'm tempted to leave it for a while and pick up something else.
I've got the Ghibli film but books are often better, so I thought it was time I found out.