| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 2002 |
|
The Circle War (abridged) | Defiance Audio | Novel | |
| August 2004 |
|
The Circle War (abridged) | Listen & Live Audio | Novel | |
| May 2009 |
|
Wingman: Books 1-4 | Playaway Digital Audio | Omnibus | |2 |
| April 2023 |
|
The Wingman Chronicles: Books 1-4 | Listen & Live Audio | Omnibus | |2 |