This was the one that got me hooked on Xanth. The first of the series that I've ever read. It was for a book report in 6th grade.
in this book bink and his his companions, crombie, chester, and the great magician humfrey, set out on a quest to find the origin of all magic in 'xanth. while on this trek bink must leave his pregnant wife behind. crombie has to leave his wife who he can't seem to understand at all right now. the great magician however has no wife and is along to help. all the while on this trek there is some 'thing trying to stop bink from finding the source.