| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1969 | 978-0-9600106-3-9 | W. H., Jr. Spears | Greek Fire: The Fabulous Secret That Saved Europe |
| 1994 | 978-0-9600106-4-6 | W. H Spears | Our two universes!!: An introduction to the Superchessmen of Spacetime (and a new proto bible for the astronautical age, or light summer reading for cosmology buffs) |