| title | media type | ISBN-13 | year of publica- tion |
|---|---|---|---|
| And the Train Goes... | Paperback | 978-1-4063-1247-8 | 2008 |
| And the Train Goes... | Hardcover | 978-0-7636-3248-9 | 2007 |
| Beware of the Frog | Paperback | 978-1-4063-1931-6 | 2009 |
| Beware of the Frog | Hardcover | 978-0-7636-3920-4 | 2008 |
| Beware of the Frog | " | 978-1-4063-0981-2 | 2008 |
| Whatever | Paperback | 978-1-4063-0133-5 | 2006 |
| Whatever | Hardcover | 978-0-7636-2886-4 | 2005 |
| Whatever | " | 978-1-84428-066-7 | 2005 |
| Whatever: Mini Edition | " | 978-0-7636-3431-5 | 2007 |