| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Roger | 978-0-00-723255-0 | 2006 | Jeremy Gerlis · Tim Cordell |
| Roger Away | 978-0-00-723256-7 | 2008 | Jeremy Gerlis · Tim Cordell |
| Roger Hangs Out | 978-0-00-723254-3 | 2007 | Jeremy Gerlis · Tim Cordell |
| The Full Roger | 978-0-00-729335-3 | 2009 | Jeremy Gerlis · Tim Cordell |