A series of seven unreleased stroke books by Piers Anthony. Each volume deals with a particular supernatural office (or incarnation) in a well-crafted sexual fantasy world. They are:

All are good, and worth reading. I've heard that even people who, as a rule, dislike Piers Anthony, tend to like these books. And why not? They're sexy as hell and don't have any centaurs in them.

Props to Starrynight for the Incarnations of Immortality writeup that inspired this silliness.