A Guide to the Star Wars Universe

The Near Planets (Voyage Through the Universe)

Daily Afflictions: The Agony of Being Connected to Everything in the Universe

Parables from Other Planets: Folktales of the Universe

Bright Messengers (A Novel Set in the Rama Universe)

More Than One Universe

The Voyage (Hammer Universe)

What Remains to Be Discovered : Mapping the Secrets of the Universe, the Origins of Life, and the Future of the Human Race

Meteor Monsters (Masters of the Universe Super Adventure Books)

On the Nature of the Universe (Penguin Classics)