| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| May 2008 |
|
Trillion the Three-Headed Lion | Orchard Books (UK) | Chapbook | |
| June 2009 |
|
Trillion the Three-Headed Lion | Scholastic | Chapbook | |
| June 2009 |
|
Trillion the Three-Headed Lion | Turtleback Books | Chapbook | |
| June 2012 |
|
Trillion the Three-Headed Lion | Orchard Books (UK) | Chapbook | |
| March 2018 |
|
Beast Quest: Set Series 2 | Orchard Books (UK) | Collection |