Demons Don't Dream (The Magic of Xanth)

Blurb

Demons Don't Dream is the sixteenth book of the Xanth series by Piers Anthony.
The Companions of Xanth computer game was marketed in a box set along with this novel. The game and novel share a storyline in which Kim and Dug, two Mundane teenagers, play a mysterious computer game that magically transports them to the realm of Xanth to compete for a one-of-a-kind prize: a magical talent. In the actual computer game, Companions of Xanth, the player assumes the role of Dug.