Encyclopedia of Xanth — Jody Lynn Nye

ENTER THE ADVENTURE
"The Zombie Master said there was a set of books once, the Encyclopedia of Xanth." Good Magician Humphrey's eyes gleamed. "They may have been stolen, or they may have walked away on their own. You find the Encyclopedia and bring it to me, and I will Answer your Question:' He then uncorked a bottle, and a fearsome purple djinn reluctantly emerged, his cloud foaming indignantly at his having been disturbed. Alister stared in amazement. He'd never seen a slow djinn fizz...