| title | ISBN-13 | year of publication |
|---|---|---|
| Invasion | 978-0-9569080-0-1 | 2013 |
| Invasion | 978-1-905237-97-5 | 2006 |
| The Horse at the Gates | 978-0-9569080-4-9 | 2015 |
| The Horse at the Gates | 978-0-9569080-2-5 | 2013 |
| The Horse at the Gates | 978-1-4538-8788-2 | 2011 |
CreateSpace Independent Publishing Platform · Matador · Tyler Press