These books are so involved and fun to read! I saw that someone had compared them to the works of L. Frank Baum of Wizard of Oz fame - I agree with that to a point. I think these books are a little more cohesive as far as the "science fiction" aspects are concerned than Baum's work, which is pretty much pure fantasy. Both authors are of course highly recommended. I can't wait to read the next book! Tooth Fairy? How cool!