Question Quest is a fantasy novel by American writer Piers Anthony, the fourteenth book of the Xanth series.

[1] The book begins with Lacuna, one of the mischievous Castle Zombie twins, seeking a way to fix her "dull" life.

Lacuna decides to make a deal that even Grey can't refuse, a way to outwit Com-Pewter.

Humfrey tells her to write down his life story (and most of Xanth's history in the process), on the walls, so that he can get the demon's attention.

Humfrey manages to save his wives from the pits of hell (sort of) and Lacuna changes her life.