Maquire has done it again; he's taken us into Oz, but not Baum's Oz, a new, different Oz.
This book begins just after the Wicked Witch of the West has her meltdown. Liir, a boy who was raised by (as he thinks of her) "the Witch," has to go out on his own. He returns to the Emerald City with Dorothy, but then is left on his own. His adventures are absorbing, and the issue of whether is the son of the Witch is left in mystery until the very end.
Another wonderful adventure in a fantasy land. The only unfortunate part is that the ending is obviously begging for another book; I guess we will have to wait to see if Maquire is going to make this a trilogy.