Aaron+Henna: The Witch-Wizard War

Aaron and Henna: Book three. Fantasy. 101627 wds, 250 pages.
The team of witch and wizard try to prevent the destruction of Gate-town by hook, crook, magic sword, demon and dragon, but the natives are just a little too tricky. Mindy has bandits, demons, her relatives, the barbarians and her wild cats to help her destroy the town.
Buffalo also helps, as does the old witch of the mountain and Harvey the book-seller.
First they have to get back there, naturally.