| # | Book Title | Author | |
|---|---|---|---|
| 1 | Catfoot's Vengeance (2015); Crogan's Vengeance (2008) | Schweizer, Chris | |
| 2 | Last of the Legion (2015); Crogan's March (2009) | Schweizer, Chris | |
| 3 | Crogan's Loyalty | Schweizer, Chris |
Juvenile Series and Sequels
| # | Book Title | Author | |
|---|---|---|---|
| 1 | Catfoot's Vengeance (2015); Crogan's Vengeance (2008) | Schweizer, Chris | |
| 2 | Last of the Legion (2015); Crogan's March (2009) | Schweizer, Chris | |
| 3 | Crogan's Loyalty | Schweizer, Chris |