If anyone hasn't read the book... It seriously is one of the best kids books ever written. It's short. You can read it in like 2 hours or less. It will take you right back to childhood. 100% worth it. Cannot recommend it enough.
I have to second this. While overshadowed by the first, all of the Oz books by L. Frank Baum are excellent reads full of imagination and compelling characters.
Jack Snow was an absolutely brilliant illustrator -- he did every book after the first one, for a very, very long time. After L Frank Baum wrote the original 14, a few other authors picked up the mantle (Ruth Plumbly Thompson being the most prolific by far) and Jack Snow did all of those, until he authored a few books himself.
Sadly, none of the other authors quite captured the surrealism, magic, and originality of the original 14, but many of them were still fun to read.
