Xone of Contention is the twenty-third book of the Xanth series by Piers Anthony.

His friend Edsel on the other hand is on the rock with his marriage to Pia, Dug's old girlfriend, who wants a divorce.

Edsel, not wanting to lose her strikes a deal with her, they take a two-week vacation in Xanth, switching with Nimby and Chlorine who want to learn about Mundania, and if she doesn't change her mind, he won't fight it.

You can help Wikipedia by expanding it.See guidelines for writing about novels.

Further suggestions might be found on the article's talk page.