I watched the last Harry Potter movie a few hours ago and, for someone who's always disliked the movie series (I've never read the books), I was pleasantly surprised by it. More importantly, it made me realise that I haven't read a good children's book in a long time. The last time was in 2010, I think, when I read E. Nesbit's The Phoenix and the Carpet, which reminds me that I have urgently to read the trilogy's last volume, The Story of the Amulet.
One of the good things about J.K. Rowling is that people are so desperate to discredit her as a writer that they'll throw lots of names of writers they think are better. Thanks to this I came across the name of one Diana Wynne Jones, whose novels have piqued my interest, particularly Howl's Moving Castle and Castle In The Air.
I'm also curious about Norton Juster's The Phantom Tollbooth.
What other books can you recommend me in this vein, which mix adventure with fantasy and, I presume, a good dose of humor?