| title | ISBN-13 | year of publication |
|---|---|---|
| Breakthrough | 978-1-78854-881-6 | 2020 |
| Catalyst | 978-1-78854-885-4 | 2020 |
| Catalyst | 978-1-5190-0464-2 | 2016 |
| Ripple | 978-1-78854-887-8 | 2020 |
| Through the Fog | 978-1-5012-1239-0 | 2015 |
C. G. · M.C. · M G*** · Michael C. · Michael G. · Michael. Grumley
Brilliance Audio · Head of Zeus · Independently published