| title | ISBN-13 | year of publication |
|---|---|---|
| Residential Geothermal Systems: Heating and Cooling Using the Ground Below | 978-0-9819221-2-6 | 2011 |
| RESIDENTIAL GEOTHERMAL SYSTEMS: Heating And Cooling Using The Ground Below | 978-0-9819221-1-9 | 2010 |
| THE GRAVITY THEORY OF MASS EXTINCTION: A new unified theory of mass extinction explains the rise and fall of the dinosaurs | 978-0-9819221-3-3 | 2011 |
| THE GRAVITY THEORY OF MASS EXTINCTION: A New Unified Theory of Mass Extinction Explains The Rise and Fall of The Dinosaurs | 978-0-9819221-0-2 | 2008 |