Agent 21 Books In OrderPublication Order of Agent 21 BooksAbout Chris RyanLeave a Reply
| Agent 21 | (2010) | Description / Buy at Amazon |
| Reloaded | (2012) | Description / Buy at Amazon |
| Codebreaker | (2013) | Description / Buy at Amazon |
| The Wire | (2013) | Description / Buy at Amazon |
| Deadfall | (2014) | Description / Buy at Amazon |
| Under Cover | (2015) | Description / Buy at Amazon |
| Endgame | (2016) | Description / Buy at Amazon |