Food is a factor.
Requires learning by death. Probably largely more accurate than Legend's Companions of Xanth, but less enjoyable for a non-fan like myself. A little on books Killobyte, A Spell for Chameleon, The Source of Magic, and Castle Roogna. There is supposed to be a considerable separation between Xanth and Mundania, but somehow the boundaries are leaking. Tangle trees have been showing up in the back yards of some readers, and ogres have assumed positions as Phys-Ed instructors in some schools.