A plot-your-own story in which brother and sister George and Zelda must help their grandparents when a man with a scar has stolen an important briefcase.
A plot-your-own story in which the dragons wake up to find the Dragon Queen missing and they must brave the Swamp of the Endless Muck and the Ice Forest to find her.
The reader is a part of the first colony of Earthlings on the Moon and must choose between joining a mission to the dark side of the Moon or being a tour guide to the visiting delegation from Earth. What the reader chooses determines the conclusion of the story.
Readers are able to choose the course of the story as they embark on an epic quest with Peter and Dresdale to find their missing parents and explore the wonders and dangers of the Hollow Earth.