| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Gray Retribution | Audio CD | 978-1-4915-2511-1 | 2014 |
| Gray Retribution | " | 978-1-4915-2520-3 | 2014 |
| Gray Vengeance | MP3 CD | 978-1-5012-5952-4 | 2015 |
| Run and Hide | Paperback | 978-1-5039-0308-1 | 2018 |
| Seek and Destroy | " | 978-1-5039-0498-9 | 2018 |
| Trojan | Audio CD | 978-1-5366-1086-4 | 2017 |
| Trojan | MP3 CD | 978-1-5366-1087-1 | 2017 |