Race for Survival

Race for Survival is a short illustrated novel released in 2000.

Writer: Marie Birkinshaw
Illustrators: Roger Harris
Publisher: Dorling Kindersley
For Ages: 2-4

Plot
Race For Survival takes place six months after the events in High Adventure Deep Underground.
Details
On the side of each page is a small article on Geology. It is, for the most part, canon, however there are two minor inconsistencies:
Planet U is located at the farthest reaches of the Milky Way, instead of being in another galaxy.
Slimy Slugs are giant and swallow Energy Crystals, while in the games they are really the size of Rock Raiders, and, while they might be able to reach great sizes, they drain the crystals of their power instead of devouring them.

Interestingly, the cover shows Jet and Axle escaping a lava flow on a Hoverboard, though this scene never appears. The Hoverboard does not even appear in the book.