| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 1-5266-0621-6 | 1526606216 |
| ISBN-13 | 978-1-5266-0621-1 | 9781526606211 |
| Agency | English language | |
| Publishers | Bloomsbury Children's Books | |
| Bloomsbury | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 1-5266-0620-8 | 1526606208 |
| ISBN-13 | 978-1-5266-0620-4 | 9781526606204 |
| Agency | English language | |
| Publishers | Bloomsbury Children's Books | |
| Bloomsbury | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 84-18174-10-2 | 8418174102 |
| ISBN-13 | 978-84-18174-10-0 | 9788418174100 |
| Agency | Spain | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 84-18174-27-7 | 8418174277 |
| ISBN-13 | 978-84-18174-27-8 | 9788418174278 |
| Agency | Spain | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 84-17879-71-4 | 8417879714 |
| ISBN-13 | 978-84-17879-71-6 | 9788417879716 |
| Agency | Spain | |
| Publisher | Editorial Empúries | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | ||
| ISBN-13 | 979-11-92776-07-1 | 9791192776071 |
| Agency | Korea, Republic | |
| Publisher | Moonhak | |